Add option to set decimal precision and step value
Link to explanation for compilation issues with custom Cocoapods configurations.
Support constant values in tweaks.

Two fixes here:
 - Cast points to (void *) before storing in struct to avoid warning.
 - Update _Generic to support const types in addition to regular ones.
Added in full export support.

 - offloaded the dictionary representation to FBTweakStore
 - adjusted toolbar to not have a hardcoded height
 - Cleaned up tableview insets, and cleaned up mail handling
 - Fixed plist exporting
Merge branch 'master' of https://github.com/facebook/Tweaks

Conflicts:
	FBTweak/_FBTweakTableViewCell.m
	FBTweakExample/FBAppDelegate.m
Made indents in line with coding style
Added NSCoder to precision and step value
Merge pull request #18 from renssies/master

Add option to set decimal precision and step value
Added "Done" button to _FBTweakCollectionViewController
Merge pull request #32 from akisute/feature/30

Added "Done" button to _FBTweakCollectionViewController
Fixing test files: now everything is green
Keeping the same cell mode after edits
Tweaks 1.1.0.