NEW FEATURE: OAuth Tumbler sharer, written from scratch.
NEW FETURE: added share dialogue with tags, title, body, publish on tumblr
NEW FEATURE: allow different display/save items in SHKFormFieldSettings. Handy if user has to pick some keys (share parameters), but the keys itself are not user friendly. This allows user to choose from readable options, which are mapped to actual share parameters on form save.
NEW FEATURE: SHKTumbler publish type option info picker localized
CLEANUP: remove unused "slug" translation
REFACTORING: minor enhancements in core files, notification names are now declared
NEW FEATURE: added SHKTumber blog choice option controller
BUGFIX: crash when user denies access in oauth authorise view
SHKTumblr enhancements:

- validateItem now checks if blog is set
- logout deletes user info dictionary from defaults
- if user info is saved already, blog is pre filled, so that user does not need to choose
DOCUMENTATION: updated OAuth web service template
BUGFIX: SHKTumblr default sharing options improved and fixed, so that user spends least possible time editing the post.
NEW FEATURE: added URL sharing to SHKTumblr
REFACTORING: minor send method code reduplication and cleanup
REFACTORING: SHKItem uses modern Objective-C syntax
NEW FEATURE: Tumbler can share image (both SHKShareTypeImage and SHKShareTypeFile). If you use SHKShareTypeFile metadata are preserved.
Merge branch 'master' of github.com:ShareKit/ShareKit