Description of problem:
The hgk extension (providing the hg view command) relies on being able to invoke
a standalone script to do some of its work. The extension itself is in the RPM,
but the script is not.

Version-Release number of selected component (if applicable):
mercurial-0.9.3-1.fc6

How reproducible:
Always

Steps to Reproduce:
1. Add to $HOME/.hgrc
[extensions]
hgext.hgk=
2. Goto a local HG repository
3. Run 'hg view'
  
Actual results:
sh: hgk: command not found


Expected results:
The HG viewer is displayed

Additional info:
The RPM spec file needs to include the file  contrib/hgk. The extension assume
it is in $PATH, but since its not intended for use directly by a end-user it is
 perhaps putting it in /usr/libexec/hgk and fixing the extenion to run it from
there.