Fixed compiler warning
Merge pull request #161 from hrsimoes/master

Fixed compiler warning
Set development compatibility of nibs to the n-1 version of Xcode

Fixes some compiler warnings.
Merge remote-tracking branch 'upstream/master' into develop

Conflicts:
	Classes/Priority.m
	Classes/TaskViewController.m
Replace deprecated modal view controller methods.
Remove out-of-tree framework search path.
Avoid adding nil to an array.
Revert "Start re-creating TaskViewController as primarily for editing text."

This reverts commit 2d655d5ac3cc729ffe6c8923adfeb1ec6ece03a4.

Conflicts:
	View Controllers/TaskViewController.m
	todo.txt-touch-ios.xcodeproj/project.pbxproj
Coding style changes to TaskViewController, and delete some nibs.

* Prefer @property's to ivars
* Use NSArray rather than char arrays
* Use newer modal view controller presentation method
Convert to storyboards for most views.

Table view cells and the keyboard accesssory still use nibs.
Merge branch 'feature/storyboards' into develop