Broken project after dependency on android-support-v7-appcompat added.
Exceptions:
 - Error retrieving parent for item: No resource found that matches the given name '@android:style/Theme.Base.AppCompat.Light.DarkActionBar'.	themes.xml	/SimpleTwitterClient/res/values	line 4	Android AAPT Problem
 - R cannot be resolved to a variable in almost all classes.
Fixing broken project and ignoring compatibility for now.
Currently, android:minSdkVersion="14"
ActionBar tabs work partially -- the Compose icon is gone!
Also, how to refresh a specific tab when we return from ComposeActivity?
Disabling ActionBar tab styling for now and hoping to refresh timeline
after composing a tweet. But Compose Tweet icon is still gone!
ActionBar icons are working reasonably well with tabs at this point.
The icons appear, so do the tabs, tweets can be composed and clicking
on profile view icon pulls up ProfileActivity just fine.

Committing this set of changes and merging branch back to master.