Changes from 0.6c to 0.7:

core
 improved merge logic
 improved copy/rename support (still experimental)
 automatic binary file handling
 generic file filtering support
 locate branches by tag
 various performance improvements
command line
 new bundle/unbundle commands for exchanging native updates
 more natural support for remove, copy, and rename
 faster, more powerful log command
 new grep command for searching entire history
 support for plug-in extensions
 improved exception handling and debugging facilities
hgweb
 optional downloading of tarballs and zip files
Windows support
 hardlinking support
 newline conversion through file filtering
contrib
 updated hgk