Do not ignore default choices for ForceScheduler list parameters
json: proper path root in examples

this is needed when you map the buildbot instance for example to
http://example.com/buildbot with a reverse proxy
tutorial, PR #760: Add Dockerfile and documentation for Buildbot Pyflakes tutorial.
fix anomalous-backslash-in-string (W1401) pylint warning

This warning is often triggered by regular expressions, and prefixing
to the open quotation mark will make python leave any escape sequences
alone, e.g.:

 - re.compile("\w+")
 + re.compile(r"\w+")

This solution is not specific for regular expressions, it can be applied
to any string that contains backslashes that python should not interpret.

This commit also enables the warning in common/pylintrc.
Fix problems in warning log; fixes #2564
Merge branch 'master' of git://github.com/zapster/buildbot
Merge branch 'master' of git://github.com/lewurm/buildbot
Merge branch 'master' of git://github.com/mzdaniel/buildbot

Conflicts:
	master/docs/relnotes/index.rst
Merge branch 'topic/pylint-anomalous-backslash-in-string' of git://github.com/olof/buildbot
Don't spam test output with deprecation warnings

This additionally tests some of those deprecation warnings, and enables
deprecation warnings universally during tests
add compatibility for deprecation elimination
render '\e[m' as a class-less SGR; fixes #2565