Added Travis.ci integration
Conflicts resolved
Merge branch 'master' into version-0.5
Merge branch 'master' into version-0.5
Added tests to support #74
Merge pull request #77 from macfanatic/title_function_from_module

Added tests to support #74
Cleaning up screen nav specs

Also consolidated where we're checking for main_controller.
Fix Title issue. Changed the way that screens manage titles.

Fixes possible conflicts in two separate instances of the same Screen.
Fixes #74
Merge pull request #78 from silasj/master

Fix title issue and change the way that screens manage titles.
Version 0.6.1
Allow set_nav_bar_*_button to accept UIBarButtonItem
Merge pull request #80 from tmilewski/version-0.7-UIBarButtonItem

Allow user to specify a UIBarButtonItem as the title for a nav bar button item.
Merge pull request #81 from clearsightstudio/version-0.5

Merging branch w/ random commits ahead of master
Merge pull request #82 from clearsightstudio/version-0.6

Version 0.6 branch -- merge into master
Updating to version 0.6.2