Travis: Added OSX, use default compilers, moved cmds into own scripts

.travis-deps.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+set -e
+
+#if OS is linux or is not set
+if [ "$TRAVIS_OS_NAME" = linux -o -z "$TRAVIS_OS_NAME" ]; then
+    sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
+    sudo apt-get -qq update
+    sudo apt-get -qq install g++-4.8 xorg-dev libglu1-mesa-dev libglew-dev libxcursor-dev
+    sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.8 90
+    git clone https://github.com/glfw/glfw.git
+    mkdir glfw/build && cd glfw/build
+    cmake .. && make && sudo make install 
+    cd -	
+elif [ "$TRAVIS_OS_NAME" = osx ]; then
+    brew tap homebrew/versions
+    brew install glew qt glfw3 pkgconfig
+fi