* [Mail/Reply] Fixed an "out of memory" issue with the quote formatting when replying to a message with very long quoted blocks.  The reported case had quotes that were 25+ levels deep.
[Code Cleanup] Refactored the way BLOCKQUOTEs are converted to plaintext in the DevblocksPlatform::stripHTML() helper.  We now use a DOM parser rather than regular expressions.
6.6.4-checkpoint
Merge branch '6.6.4' into stable