Added error messages (and config.php) (fuzzymannerz#5)

* Code cleanup as preperation
 - removed all query functions to system.php
 - swmp.php is now main file to get system information
 - moved additional util functions in utils.php (from mainclass.php)
 - added gitignore (with entries for intellij and normal default values)

* Added error messages for failed commands

* added config.php with a few settings (mainly to disable errors)

* Added new themes to config.php comment

.gitignore

@@ -0,0 +1,8 @@
+Thumbs.db
+*~
+*.DS_Store
+#*
+.idea/*
+web.config
+
+config.local.php

README.md

@@ -28,13 +28,15 @@ Simply run `bash <(curl -s -L https://getswmp.thefuzz.xyz)` from your Linux comm
 ### The Manual Way
 1. [Download the Zip file](https://github.com/fuzzymannerz/swmp/archive/master.zip).
 2. Extract the files to the web server. (You might want to secure access somehow, [.htpasswd](http://www.htaccesstools.com/htpasswd-generator/) maybe?)
-3. That's it! (Unless you want to change the theme, in which case, read on!)
+3. Optionally copy the file `config.php` to `config.local.php` and adjust the settings for your web server.
+4. That's it! (Unless you want to change the theme, in which case, read on!)
 
 ## Themes
 SWMP includes a selection of themes. The default being **simplex**. (The red and white one above)
 ![](http://i.imgur.com/vlw9NyV.png)
-To choose another theme, edit **index.php** and change line **41** to the theme of your choice.    
-The choices of theme stylesheets are located in **~/css/themes/**.
+To choose another theme, edit **config.local.php** and change line `"theme" => "slate"` to the theme of your choice. The choices are:    
+_cerulean, cosmo, lumen, paper, readable, sandstone, simplex, slate, spacelab, superhero, united_ and _yeti_.    
+All theme stylesheets are located in **~/css/themes/**.
 
 ## Show Some Love <3
 If you make use of SWMP in some way, please consider a donation.    

config.php

@@ -0,0 +1,23 @@
+<?php
+
+/*******************************************************************************/
+/** to configure swmp copy this file to config.local.php and change the values */
+/*******************************************************************************/
+
+return array
+(
+    // all themes are files in the /css/ folder
+    // available themes are:
+    // "cerulean", "cosmo", "lumen", "paper", "readable", "sandstone",
+    // "simplex", "slate", "spacelab", "superhero", "united", "yeti",
+    // "darkplex", "rose", "terminal"
+    "theme" => "simplex",
+
+    // if set to true errors are shown for system information that could not be recieved
+    // after the server is set up it is recommended to set this to false
+    "show_errors" => true,
+
+    // the windowtitle
+    // available replacements are {hostname}, {ip}, {os} and {kernel}
+    "window_title" => "SWMP | {hostname}",
+);

js/swmp.js

@@ -18,12 +18,12 @@
 
 
 // Get vars from system.php and set them for use
-var jsonramdata = JSON.parse(ramdata);
-var jsoncpudata = JSON.parse(cpudata);
-var jsonbootupdata = JSON.parse(bootupdata);
-var jsonswapdata = JSON.parse(swapdata);
-var jsonnetworkdata = JSON.parse(networkdata);
-var jsondiskdata = JSON.parse(diskdata);
+var jsonramdata = ramdata;
+var jsoncpudata = cpudata;
+var jsonbootupdata = bootupdata;
+var jsonswapdata = swapdata;
+var jsonnetworkdata = networkdata;
+var jsondiskdata = diskdata;
 
 // Set the RAM percentage used
 var ramdef = jsonramdata.percent_used;

php/swmp.php

@@ -0,0 +1,72 @@
+<?php
+
+/*///////////////////////////////////////////////
+///                                           ///
+///     SWMP - Server Web Monitoring Page     ///
+///       By Fuzzy - thefuzz.xyz - 2016       ///
+///                                           ///
+/////////////////////////////////////////////////
+///                                           ///
+///    Credits, downloads and usage info:     ///
+///    https://github.com/fuzzymannerz/swmp   ///
+///                                           ///
+////////////////////////////////////////////////////////////
+///                                                      ///
+///    If you make use of SWMP please consider to        ///
+///    show some love via PayPal, Flattr or BTC. <3      ///
+///   (Details are on the GitHub page or my website.)    ///
+///                                                      ///
+//////////////////////////////////////////////////////////*/
+
+// ================  Load settings ================
+
+$config = require "config.php";
+if(file_exists('config.local.php')){
+    $config = array_merge($config,  require 'config.local.php');
+};
+
+//===================================================
+
+require 'php/system.php';
+
+$all_errors = array();
+
+// ================  Get system info ================
+
+$hostname = getSystemHostname($all_errors);
+$ip = getLanIp($all_errors);
+$cores = getCpuCoresNumber($all_errors);
+$os = getOperatingSystem($all_errors);
+$kernel = getKernel($all_errors);
+$uptime = getUptime($all_errors);
+$bootTime = getBootupTime($all_errors);
+
+$cpumodel      = getCpuModel($all_errors);
+$cpufrequency  = getCpuFrequency($all_errors);
+$cpucache      = getCpuCacheSize($all_errors);
+$cputemp       = getCpuTemperature($all_errors);
+
+$cpudata = getCpuLoadData($all_errors);
+
+$ramdata = getRamInfo($all_errors);
+
+
+$swap = getSwapData($all_errors);
+$network = getNetworkData($all_errors);
+$disk = getDiskData($all_errors);
+
+//===================================================
+
+// Limit shown errors to max 8
+
+$error_count = count($all_errors);
+if ($error_count > 8) {
+    $all_errors = array_slice($all_errors, 0, 7);
+    $all_errors[] = "There were " . ($error_count - 7) . " more errors that are currently not shown";
+}
+
+$wtitle = $config["window_title"];
+$wtitle = str_replace("{hostname}", $hostname, $wtitle);
+$wtitle = str_replace("{ip}", $ip, $wtitle);
+$wtitle = str_replace("{os}", $os, $wtitle);
+$wtitle = str_replace("{kernel}", $kernel, $wtitle);