Using .en prefix for help pages look easier.

--HG--
rename : app/views/help/about.html.erb => app/views/help/about.en.html.erb
rename : app/views/help/api.html.erb => app/views/help/api.en.html.erb
rename : app/views/help/artists.html.erb => app/views/help/artists.en.html.erb
rename : app/views/help/bookmarklet.html.erb => app/views/help/bookmarklet.en.html.erb
rename : app/views/help/cheatsheet.html.erb => app/views/help/cheatsheet.en.html.erb
rename : app/views/help/comments.html.erb => app/views/help/comments.en.html.erb
rename : app/views/help/dtext.html.erb => app/views/help/dtext.en.html.erb
rename : app/views/help/extension.html.erb => app/views/help/extension.en.html.erb
rename : app/views/help/faq.html.erb => app/views/help/faq.en.html.erb
rename : app/views/help/favorites.html.erb => app/views/help/favorites.en.html.erb
rename : app/views/help/forum.html.erb => app/views/help/forum.en.html.erb
rename : app/views/help/image_sampling.html.erb => app/views/help/image_sampling.en.html.erb
rename : app/views/help/irc.html.erb => app/views/help/irc.en.html.erb
rename : app/views/help/mass_tag_edit.html.erb => app/views/help/mass_tag_edit.en.html.erb
rename : app/views/help/notes.html.erb => app/views/help/notes.en.html.erb
rename : app/views/help/pools.html.erb => app/views/help/pools.en.html.erb
rename : app/views/help/post_relationships.html.erb => app/views/help/post_relationships.en.html.erb
rename : app/views/help/posts.html.erb => app/views/help/posts.en.html.erb
rename : app/views/help/ratings.html.erb => app/views/help/ratings.en.html.erb
rename : app/views/help/source_code.html.erb => app/views/help/source_code.en.html.erb
rename : app/views/help/start.html.erb => app/views/help/start.en.html.erb
rename : app/views/help/tag_aliases.html.erb => app/views/help/tag_aliases.en.html.erb
rename : app/views/help/tag_implications.html.erb => app/views/help/tag_implications.en.html.erb
rename : app/views/help/tag_scripts.html.erb => app/views/help/tag_scripts.en.html.erb
rename : app/views/help/tags.html.erb => app/views/help/tags.en.html.erb
rename : app/views/help/trac.html.erb => app/views/help/trac.en.html.erb
rename : app/views/help/users.html.erb => app/views/help/users.en.html.erb
rename : app/views/help/voting.html.erb => app/views/help/voting.en.html.erb
rename : app/views/help/wiki.html.erb => app/views/help/wiki.en.html.erb
Disable rack caching (which mostly means assets caching).
Always use puma for development.
Use oj for faster JSON stuff.
Update gems.
Use nokogiri for xmlmini backend.
Readd ruby-prof for mri.
Much faster build of post/index.xml

\erb/
Forgot to remove unused tag.