Handler an OAuth provider returning oauth_problem
Cleanups

Replace NSLog with SHKLog in all ShareKit classes
Get rid of a commented-out method
BUGFIX: updated proper link for linkedIn API keys request
Adds spanish translation of message strings.
BUGFIX: SHKFormControllerLargeTextField text disappearing on iPad
BUGFIX: SHKSharerDelegate role is separated from SHKSharer
BUGFIX: classes performing on background threads refactored to retain their delegates and vice versa. This fixes MANY memory leaks
BUGFIX (Demo app): explicitly set rootViewControllers, because sometimes SHK is not able to find one.
BUGFIX: removed automatic userInfo download. Sometimes it caused auth dialog to appear twice.

Who wants to display username, can call getUserInfo manually.
Merge pull request #145 from scompt/bug/linkedin-oauth_problem

Handle oauth_problem
NEW FEATURE: added foursquare credentials to the demo app
Merge pull request #157 from gradha/spanish_translation

Adds spanish translation of message strings.
BUGFIX: silenced remaining warnings
REFACTORING: SHKFormControllerLargeTextField

- now has settable counter options
- deleted SHKTwitterForm, superclass used instead.
- changed behavior of send button - if text has invalid length, button is disabled. No more UIAlertViews.
- fixed bug: when sharing image and the text is longer then allowed, it showed IMAGE + - 5, now it shows correct IMAGE - 5
Merge branch 'bugfix/largeForm-keyboard' into refactoring/largeTextView
REFACTORING: Move SHKFormControllerLargeTextField files to /UI directory
REFACTORING: LinkedIn sharer uses SHKFormControllerLargeTextField instead of SHKLinkedInTextForm
BUGFIX: Supressed warning
BIGFIX: suppressed unused variable warning
REFACTORING: VKontakte uses SHKFormControllerLargeTextField