Change MapSnippet to be 200dp instead of 150dp.

I noticed it just looks better on my tablet and emulator.  What do you all think?
Merge pull request #178 from rogerhu/support_v4

Update Android support v4 to support DrawerLayout and ActionProviders.
Merge pull request #174 from rogerhu/map_snippet2

Change MapSnippet to be 200dp instead of 150dp.
First pass at navigation bar for RequestCreateActivity.
Add drawables icon for drawers.
Add navigation drawer XML.