don't use deprecated BaseException.message

This fixes following deprecation warning:

buildslave/scripts/create_slave.py:215: DeprecationWarning:
        BaseException.message has been deprecated as of Python 2.6
console: remove limit of 25 changesets requested from db.
console: remove doubling of builds requested if devName set.

When the revs parameter is large doubling the number of builds would
significantly increase loading time. Setting the devName does not increase
or decrease the number of changesets loaded from db, so there is not
much help in only increasing the number of builds loaded.
console: support for multiple codebases.

Changes / Effects:

1) Only the changes in a build is used to compare with the changeset revision.
The revision id from got_revision is not used.

2) If there are multiple builds with the matching changeset the first one
found is used. So if a slave is lost the build is marked as exception. Then
when the build is restarted that will be used instead.

3) Fixed it from loading all builds when multiple codebases is used.
console: check codebase is in build before checking revisions
console: hide box if codebase of change is not in builder.
Merge branch 'console_rev_count' of git://github.com/thedylman/buildbot
Merge branch 'fix-deprecated-warn' of git://github.com/elmirjagudin/buildbot
Unsubscribe from watched builders during stop so reconfigure works correctly
unit tests of buildbot.status.web.base.plural() method
unit tests of buildbot.status.web.base.abbreviate_age methid()
test running 'buildslave stop' with invalid basedir path
test running 'buildslave restart' with invalid basedir path
clean-up
added unit test on buildslave.util.remove_password()

Check that remove_password() handles correctly paths with '@' sign.
small simplification of buildslave.util.remove_password()
Merge branch 'fix_status2' of git://github.com/jamie-cyber1/buildbot
Merge branch 'unit-tests' of git://github.com/elmirjagudin/buildbot
Merge branch 'console-multi-codebase' of git://github.com/thedylman/buildbot
add relnotes