- Update to 0.2.37, Announce message:

 Add twip unit to length category
 modifed appdata location to help with making RPM
Update to the 20140601 snapshot of GCC 4.10.

This has a workaround for clang pretending to be GCC but not being
compatible, so we no longer need to require GCC to build, even on
amd64.
- Convert USE_BZIP2/XZ to USES

Approved by:	portmgr
Update to 2.0.5.1.