[#2840] ticket:272 task for code snapshots generation
[#2840] ticket:273 user interface for tarball
[#2840] ticket:273 fixed errors
[#2840] ticket:273 add raise exc.HTTPNotFound() to controllers and change  filename of the tarball for svn and hg
[#2840] ticket:273 Minor style fix
[#2840] Tweak UI for snapshot download

Signed-off-by: Cory Johns <johnsca@geek.net>
[#2840] Added gzip compression to snapshot

Signed-off-by: Cory Johns <johnsca@geek.net>
[#2840] Bumped version of ForgeHg for snapshot

Signed-off-by: Cory Johns <johnsca@geek.net>