tracbuildbot/buildbot_api.py: improved request performing.
tracbuildbot/web_ui.py: added BuildbotJsonApiHandler to load info for buildbot_page instead of direct way.
tracbuildbot/htdocs/js/buildbot.js: build info generating rewritten with mustache.js template lib.
tracbuildbot/templates/buildbot_builds.html: small fixes.
tracbuildbot/buildbot_api.py: added no builds for builder detect.
tracbuildbot/htdocs/js/buildbot.js: another sall fix.
tracbuildbot/*: moved settings and api and cache access logic to buildbot_provider.py.
tracbuildbot/buildbot_cache.py: improved db use.