REFACTORING + SUBMODULE UPDATE: Facebook iOS sdk updated to 3.8 + removed Facebook's subproject: now the framework is included directly.

Advantages of direct include:
- less problems with configuration
- improved build time
SUBMODULE UPDATE: Dropbox - removed as submodule, added as framework
SUBMODULE UPDATE: google api objectivec
BUGFIX: SHKFormFieldLargeText

- on iOS7 there is no clip
- when imageTextLenght was set without image there was send button unlocking on wrong letter count.
BUGFIX: cleaned and fixed framework search path settings
BUGFIX: framework search paths settings cleaned on sharekit static lib target
BUGFIX: fixes #792. UITextField returns @"" instead of nil on iOS7
Fix for #790. Allows to compile on Xcode 4.x
Fix for issue #774: Dropbox pushing file up preserves entire path to local file instead of just filename. Use kSHKDropboxStoredFileName for filename instead of entire path.
BUGFIX: fixes #788 show instagram only is now configurable
Merge pull request #796 from kurtzmarc/master

Fix for issue #774: Dropbox pushing file up preserves entire path to loc...
BUGFIX: Improved Facebook error handling
SUBMODULE UPDATE: google-api-objectivec to r362
BUGFIX: fixes #784
NEW FEATURE: added possibility to override cell creation methods in SHKFormController subclass. You can now easily use your own type of cells in share dialogue.
SUBMODULE UPDATE: evernote-ios-sdk
SUBMODULE UPDATE: google-api-objectivec
Added semi-colons to the end of the lines for
//twitter text filed placeholder
 "Tweet" = "Tweet";

 //universal
 "Message" = "Message";

Fixes warning I was seeing:
CFPropertyListCreateFromXMLData(): Old-style plist parser: missing semicolon in dictionary on line 278. Parsing will be abandoned. Break on _CFPropertyListMissingSemicolon to debug.
Merge pull request #799 from scottcarter/en_localization_fix

Added semi-colons to the end of the lines for Tweet and Message strings in English localization.
SUBMODULE UPDATE: SSKeychain. Now uses proper origin github.com/soffes instead of obsolete github.com/samsoffes.