mailcore2 - simple and asynchronous API to work with IMAP, POP, and SMTP

	Commit message (Expand)	Author	Age
*	Fixed includes	CodaFi	2013-09-26
*	Implement Objective-C Interface	CodaFi	2013-09-24
*	Fixed memory leak on cancellation in ObjC API	Hoa V. Dinh	2013-07-25
*	Fixed logger	Hoa V. DINH	2013-07-03
*	Fixed memory leak: operations were retained by the block they owned, which cr...	Hoa V. Dinh	2013-06-28
*	Implemented logging API for SMTP, POP and IMAP	Hoa V. DINH	2013-06-26
*	POP operations retain the session. Fixed #129	Hoa V. DINH	2013-06-22
*	Fixed #97: manual disconnection of POP session	Hoa V. DINH	2013-06-22
*	Updated the rest of the docs	Matt Ronge	2013-06-02
*	Implemented checkAccount operation for POP	Hoa V. DINH	2013-04-06
*	IMAP Objective-C API documentation completed.	Hoa V. DINH	2013-04-06
*	Work in progress on IMAP documentation.	Hoa V. DINH	2013-04-06
*	Header documentation. Header clean-up	Hoa V. DINH	2013-04-04
*	Documentation for POP Objective-C API.	Hoa V. DINH	2013-04-04
*	#include <mailcore/mailcore.h> -> <MailCore/MailCore.h>	Hoa V. DINH	2013-04-03
*	Check for nil completion blocks. Fixed #15	Hoa V. DINH	2013-04-01
*	Implemented ObjC API for SMTP and POP	Hoa V. DINH	2013-03-30