Transition from Otto to EventBus
Includes some comment improvements and code reduction
Gradle tweaks
Merge pull request #90 from bkensey/dev-switch-to-eventbus

Switch from Otto to EventBus for our bus needs
Update build.gradle for Android Studio 0.8 including new error fixes
NavigationFragment documentation tweak
Improve breadcrumb UI behavior
The pager and child breadcrumbs no longer have a width of 'match parent'.  Instead, they pager wraps the width of the widest breadcrumb and pads the other.  Width spacing should be back to the way it was before implementing the pager.
Fix issue #83
Add send icon for send actions
Add empty history button to dropdown
This additional spinner dropdown item will serve as the new trigger for the history activity.
Enable history button
History button in breadcrumb dropdown now opens history, and the history menu item has been removed.
Post-rebase fixes