Add OSX TravisCI configuration

- Use the current build target to decide which dependency script to run. 
- Add an OSX dependency script which installs dependencies with homebrew.

.travis.yml

@@ -3,17 +3,20 @@ compiler: gcc
 language: cpp
 sudo: required
 dist: trusty
-os: linux
+os: 
+ - linux
+ - osx
 
 branches:
   only:
     - develop
     - master
-    - refactor/unittest 
+    - refactor/unittest
+    - feature/travisosx
 
 before_install:
     - echo Install dependencies
-    - travis-ci/deps.sh
+    - travis-ci/deps-${TRAVIS_OS_NAME}.sh
 
 install:
     - echo Building INDI Core

travis-ci/deps-linux.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+set -x
+
+sudo apt-get -qq update
+sudo apt-get -q -y install libusb-1.0-0-dev libcfitsio3-dev libnova-dev
+sudo apt-get -q -y install libgphoto2-dev libgps-dev libjpeg-dev cdbs
+sudo apt-get -q -y install libopenal-dev libgsl0-dev libboost-dev
+sudo apt-get -q -y install libboost-regex-dev libftdi-dev dcraw fakeroot
+sudo apt-get -q -y install wget curl
+
+if [ ! -z $BUILD_INSTALL_GTEST ]; then
+  /bin/bash install-gtest.sh
+else
+  echo "==> BUILD_INSTALL_GTEST not specified"
+fi
+
+exit 0
+

travis-ci/deps-osx.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+set -e
+
+brew update
+brew tap polakovic/astronomy
+
+# Not available in homebrew:
+# cdbs \
+# boost-regex \
+# libgps \
+# libgsl0  \
+# libopenal \
+
+# Already installed:
+# boost \
+
+
+brew install \
+			curl \
+			dcraw \
+			fakeroot \
+			libftdi \
+			libgphoto2 \
+			libjpeg \
+			libusb \
+			polakovic/astronomy/libcfitsio \
+			polakovic/astronomy/libnova \
+			wget
+
+if [ ! -z $BUILD_INSTALL_GTEST ]; then
+  /bin/bash install-gtest.sh
+else
+  echo "==> BUILD_INSTALL_GTEST not specified"
+fi

travis-ci/install-gtest.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+set -e
+
+mkdir -p build
+pushd build
+git clone https://github.com/google/googletest.git
+if [ ! -d googletest ]; then
+echo "Failed to get googletest.git repo"
+exit 1
+fi
+pushd googletest
+mkdir build
+cd build
+cmake ..
+sudo make install
+popd
+rm -rf googletest
+popd