v0.6.4.5

v0.6.4.5 is being pushed out to take advantage of needing to distribute new builds of 6.4.4 to incorporate the Heartbeat SSL fix. So we might as well increment version number and include the Alert Key change at the same time.

   - Change Alert PubKey so we can send alerts (currently do not have private
     key for the original pubkey used)
   - Various makefile fixes and cleanups. enable build_info for windows on
     sexcoin-qt and sexcoind.exe
   - Added -fpermissive to downgrade a compile error to warning for mismatched
     function argument type

pull these commits in and tag everything as v0.6.4.5