Merged with #92. Version inc.
Documentation updates
Merge remote-tracking branch 'origin/master'
New methods for localized strings from VK bundle
VKUploadImage was moved to separate file. Added upload object with source image
Updated integer types
Added missing header
Updated data model classes
Private ivars moved into private properties
Returned descriptions for VKError
Updated example headers
Fixed token recreation during validation process
Updated models. Fixed user exports field
Added request processing queue to prevent many threads creation
New icons
Fixed validation process
Added missing header
Added flag to check request execution state
Added method names for VKRequest description
Share dialog. #3