Added invalidation and cancelation of NSURLSession in dealloc to avoid memory leaks. Started using weak+strong references for avoiding possible retain cycles in Blocks.
Shifted imports to the new @import nomenclature available in iOS7 for faster compilation.
Added missing gitignore file, based from https://github.com/github/gitignore/blob/master/Objective-C.gitignore
Workaround for Apple’s bug with UITableViewCells’ separators not displaying correctly after rotation.
Merge branch 'hotfix/nsurlsession_leak'

Conflicts:
	MasterDetail/IDTViewController.m
Merge branch 'hotfix/new_import_nomenclature'
Merge branch 'hotfix/missing_gitignore'