[scm-migration-dev] provide a hook capable of running other collections of hooks in the background.

[david.mar...@sun.com]

Author: dmarker <David.Marker at sun.com>
Repository: /hg/scm-migration/onnv-gk-tools
Latest revision: 31c303d99a38e4f550da3b97a517ea0a1cb34e57
Total changesets: 1
Log message:
provide a hook capable of running other collections of hooks in the background.
update cache.py to look for $TIP environment variable and fall back on "tip".

Files:
        create: hook/bghook.py
        update: hook/cache.py