Added an empty Navigation Drawer

On branch master
Changes to be committed:

	modified:   .gitignore
	modified:   build.gradle
	modified:   src/main/res/layout/activity_main.xml
Optimized imports + reformatted code

On branch master

Changes to be committed:

	modified:   src/main/AndroidManifest.xml
	modified:   src/main/java/com/periwinkleinnovations/chromareader/MainActivity.java
	modified:   src/main/java/com/periwinkleinnovations/chromareader/NavigationDrawerFragment.java
	modified:   src/main/res/layout/activity_main.xml
	modified:   src/main/res/menu/global.xml
	modified:   src/main/res/menu/main.xml
	modified:   src/main/res/values/dimens.xml