Merge pull request #5 from sitecore-ios-opensource/master

Documentation improvements
Merge pull request #6 from sitecore-ios-opensource/master

[coverage] Added unit tests
[appledoc] Added documentation
[appledoc] Fixed unsupported initializer description
[appledoc] Added comments for the enum
[appledoc] added descriptions for POD structures
[appledoc] Documented an error
[appledoc] Added documentation for year mode parser
[appledoc] Documented persistent date formatter class
[appledoc] Documented half-year formatter classes
[applecod] Documented date to range converters
[appledoc] commented date resolution constants
[appledoc] Documented NSDate mock
[appledoc] Documented date alignment functions
[appledoc] Added ignore directories to the script
[xcode] Enabled xcode 5.1 specific warnings
[appledoc] Fixed appledoc tool warnings
[appledoc] Fixed formatting issues. Made docs look nicer.
[readme] Added a link to appledoc
Merge pull request #7 from dodikk/appledoc

Added documentation for public API