Merge remote-tracking branch 'upstream/master'
Implement size search
Added size request to get message size of complete message (MCOIMAPMessagesRequestKindSize)
Merge https://github.com/CodaFi/mailcore2
Testing search expressions with size
Merge branch 'Search-Size' of https://github.com/CodaFi/mailcore2
Check for if search expression for size works
Added constant IMAPMessagesRequestKindSize to IMAPMessagesRequestKind, somehow file was not updated after testing with searchExpression changes of CodaFi
Changed MCOIMAPMessagesRequestKindSize to camelCase.
Removing unnecessary return.
Merge pull request #484 from yellowandy/patch-1

Removing unnecessary return.
Merge latest changes including search-size from CodaFi and continue from there with size changes
Merge https://github.com/MailCore/mailcore2
integrated changes from codaFi into my branch so we can merge this into the main mailcore branch
Merge pull request #481 from pfennema/master

Added size request to get message size of complete message, added size search features.