buildrequest collapse
 - TODO:
   - update master/docs/manual/customization.rst
break the brdict loop as soon as possible
 - do not use brdict term
 - use worst_status
 - don't ignore buildset with claimed br
Makefile: Allow to use another pip than the system one

When installing buildbot in a not-activated virtualenv, it comes handy to define PIP before calling make frontend.
Add possibility to restart single slave
Do not use --quiet options since it always return EXIT_SUCCESS
change step state_strings to state_string: DB model
change step state_strings to state_string: DB API
change step state_strings to state_string: data API + consumers
remove outdated TODO
change build state_strings to state_string: DB model
change build state_strings to state_string: DB API
change build state_strings to state_string: Data API + consumers
add a --no-js option to validate.sh
switch $slow to $quick and negate
Add more information about buildbot upgrade errors (Refs: #2588)
Remove Progress/ETA support.

This is part of removing the reliance on status APIs in bug 2818.  The
progress interface wasn't very good, anyway, and will be re-implemented
in bug 2590.
Update tests
Merge pull request #1268 from djmitche/2818c

Remove Progress/ETA support.

See ticket:2818
Merge pull request #1266 from benallard/patch-6

Makefile: Allow to use another pip than the system one

See ticket:2877