Added checkpoint

Another test release

testing new 0.6.3 release

Litecoin version 0.6.3

OSX-special build (0.6.2 plus fix for 100% cpu usage bug)

0.6.2.1: bug fix for 100% cpu usage on mac.

Version 0.6.2 (bug fix release)

Version 0.6.1

Version 0.6.1 release candidate 2

Version 0.6.1 (bug fixes, code cleanups) release candidate 1