Correct patch for #68: fixed assert when calling IMAPFolderInfoOperation when session is not connected
Fixed #61: annotate explicitely -copyMessagesOperationWithFolder:uids:destFolder: to avoid wrong guess by clang ARC
Added public header
Merge branch 'master' of https://github.com/lostincode/mailcore2

Conflicts:
	src/async/imap/MCIMAPFolderInfoOperation.cc
	src/core/imap/MCIMAPSession.h