generate .mo files in all available languages
add a pip requirements file
add log messages
ignore doc/locale/pot
Update jenkins jobs

  - add a 60 minute build timeout
  - clean the workspace up between builds
  - send build failure emails
Add a Ubuntu 12.04 hardening build for 4.1.x
Merge branch 'doc-i18n' of https://github.com/trafficserver-doc-ja/trafficserver