Initial commit of arrays resource and changed the layout for the main content view

Added arrays.xml.  Changed LinearLayout to FrameLayout.
Updated gitignore

Git should now ignore build files
Removed .gradle and */build/ from the index
Initial commit of list item layout resource and implemented onCreate method in NavDrawerActivity

The list item resource file contains the layout of the list items for the navigation drawer ListView.  In onCreate, did initial setup to get content for the ListView and DrawerLayout.  Set the OnItemClickListener for the ListView but must implement the onClick method.
Layout, resource and id fixes for the DrawerLayout

Upgraded the minSDK version in the manifest to 11 to support Fragments.  Renamed some views.  Added a TextView to the initial activity layout.  Changed the layout of the list_item.xml to contain only a TextView.
Initial commit for resource files: drawable selector, fragment layout, and colors

Created a Drawable resource for the list item selector in the ListView of DrawerLayout.  Created a Layout resource for a Fragment.  Created a colors resource file with FlatUI colors.
Improved NavDrawerActivity

Implemented a method to switch fragments in the main view when list items are selected from the DrawerLayout.  Modified layout for NavDrawerActivity.
Created a Fragment for swapping views and modified the layout for the list item.

Expanded the layout for the DrawerLayout > ListView > list item.  Initial commit for ContentFragment.  Changed minSdkVersion in the manifest.
Modified resources

Removed unused states for the selector.  Renamed the FrameLayout in NavDrawerActivity and changed the background color.  Changed the background color of the frame fragment.  Added to the string resources.
Improved NavDrawerActivity

Used the FrameLayout container to add an initial fragment upon starting the app.  The switchFragment method gets the selected option from the ListView and uses the String to populate a TextView in the fragment.  Implemented addToBackStack for improved workflow.
Merge branch 'refs/heads/develop'