Remove rescue since RubyMotion bug was fixed.
Revert "Remove rescue since RubyMotion bug was fixed."

Specs are still failing.
This reverts commit 63ea07f4f7664799aa18e3385f12836d2b3b056e.
Tab bar refactor

* Fixes issue #167
* Added PM::TabBarController
* Moved some PM::Tab methods into PM::TabBarController
* Moved some tab-related accessors into PM::Tab
* Allowed `open_tab` from AppDelegate and on the PM::TabBarController
directly
* Added tests
* Added a method: set_tab_bar_badge(number)
* Also fixed an error in the cell identifier creation code that was
creating too many identifiers

75 specifications (144 requirements), 0 failures, 0 errors
Merge branch 'master' into feature_tabs_for_all
Remove tab_bar_item
Travis bump
Merge pull request #179 from clearsightstudio/feature_tabs_for_all

PR: Tab bar refactor