check and raise errors on duplicated project names
create a form for codebases
Merge branch 'katana' into projects

Resolve Conflicts:
	master/buildbot/status/web/templates/codebases.html
resolve merge conflicts on codebases.html
Force form use selected codebase
filter finsih builds by codebases & update force form

- filter finsih builds by codebases on builders page
- update force form to display in a label selected codebases.branch
add form input for selected codebases x branch
return to builders keeping the codebases selection
check codebases in pending and current builds
use codebases filter in build details
codebases args
specify the paths to codebases and builders
keep url request of codebase selection and multiple projects
change force scheduler defaults
pass codebases parameter to rebuild / stop, changed defaults
adjust unit test to changes, fix reason label