Add master-detail flow template.
Add resources from navigation drawer template.
Add layout alias for two-pane display.

This fixes a bug that caused devices with large screens to use the single-pane
layout.
Add basic navigation drawer.

This integrates the navigation drawer code from the Android Studio nav drawer
template, with various minor changes.
Fix an erroneous comment.
Add basic navigation drawer menu.

This is a very rough, incomplete, initial implementation of a navigation
drawer menu.
Improve nav drawer styling.
Show Up icon in one-pane detail activity.

The Up icon replaces the navigation drawer icon in the ItemDetailActivity.
Move nav drawer strings to resource file.
Add highlighting on selected nav drawer item.
Move navigation drawer classes to new package.
Merge branch 'drawer' into dev
Add copyright notices.
Add Android SQLiteAssetHelper library.
Add "data" package.

This commit adds all files from the "data" package in the original version of
this project. I have made minor changes to the files to make them compatible
with this version of the project and to fix various errors, but I have not
tested them. They should be thoroughly reviewed, improved, and tested at a
later date.
Add external library to build file.
Add databases and update readme.
Add database installation code.
Fix error in readme.
Add subpackages to "data" package.