Changed wording in build.md and debug.md

I've adjusted the wording in the build and debug files to flow better and make more sense in English.

docs/build.md

@@ -3,44 +3,44 @@
 ## Development
 
 We use Webpack HMR to develop Boostnote.
-You can use following commands to use default configuration at the top of project directory.
+Running the following commands, at the top of the project directory, will start Boostnote with the default configurations.
 
-Install requirement packages.
+Install the required packages using yarn.
 
 ```
 $ yarn
 ```
 
-Build codes and run.
+Build and run.
 
 ```
 $ yarn run dev-start
 ```
 
-This command runs `yarn run webpack` and `yarn run hot` in parallel. It means it is the same thing to run those commands in 2 terminals.
+This command runs `yarn run webpack` and `yarn run hot` in parallel. It is the same as running these commands in two terminals.
 
-And webpack will watch the code changes and apply it automatically.
+The `webpack` will watch for code changes and then apply them automatically.
 
-If this error: `Failed to load resource: net::ERR_CONNECTION_REFUSED` happens, please reload Boostnote.
+If the following error occurs: `Failed to load resource: net::ERR_CONNECTION_REFUSED`, please reload Boostnote.
 
 ![net::ERR_CONNECTION_REFUSED](https://cloud.githubusercontent.com/assets/11307908/24343004/081e66ae-1279-11e7-8d9e-7f478043d835.png)
 
 > ### Notice
-> There are some cases you have to refresh app yourself.
-> 1. When editing constructor method of a component
-> 2. When adding a new css class(same to 1: CSS class is re-written by each component. This process occurs at Constructor method.)
+> There are some cases where you have to refresh the app manually.
+> 1. When editing a constructor method of a component
+> 2. When adding a new css class (similar to 1: the CSS class is re-written by each component. This process occurs at the Constructor method.)
 
 ## Deploy
 
-We use Grunt.
-Acutal deploy can be run by `grunt`. However, you shouldn't use because the default task is including codesign and authenticode.
+We use Grunt to automate deployment.
+You can build the program by using `grunt`. However, we don't recommend this because the default task includes codesign and authenticode.
 
-So, we prepare a script which just make an executable file.
+So, we've prepared a separate script which just makes an executable file.
 
 ```
 grunt pre-build
 ```
 
-You will find the executable from `dist`. In this case, auto updater won't work because the app isn't signed.
+You will find the executable in the `dist` directory. Note, the auto updater won't work because the app isn't signed.
 
-If you are necessary, you can do codesign or authenticode by this excutable.
+If you find it necessary, you can use codesign or authenticode with this executable.

docs/debug.md

@@ -1,20 +1,20 @@
-# How to debug Boostnote (electron app)
-The electron that makes Boostnote is made from Chromium, developers can use `Developer Tools` as same as Google Chrome.
+# How to debug Boostnote (Electron app)
+Boostnote is an Electron app so it's based on Chromium; developers can use `Developer Tools` just like Google Chrome.
 
-This is how to toggle Developer Tools:
+You can toggle the `Developer Tools` like this:
 ![how_to_toggle_devTools](https://cloud.githubusercontent.com/assets/11307908/24343585/162187e2-127c-11e7-9c01-23578db03ecf.png)
 
-The Developer Tools is like this:
+The `Developer Tools` will look like this:
 ![Developer_Tools](https://cloud.githubusercontent.com/assets/11307908/24343545/eff9f3a6-127b-11e7-94cf-cb67bfda634a.png)
 
 When errors occur, the error messages are displayed at the `console`.
 
 ## Debugging
-For example, there is a way to put `debugger` as a breakpoint into the code like this:
+For example, you can use the `debugger` to set a breakpoint in the code like this:
 
 ![debugger](https://cloud.githubusercontent.com/assets/11307908/24343879/9459efea-127d-11e7-9943-f60bf7f66d4a.png)
 
-But this is only an example. You need to find a way to debug which fits with you.
+This is just an illustrative example, you should find a way to debug which fits your style.
 
 ## References
 * [Official document of Google Chrome about debugging](https://developer.chrome.com/devtools)