Add vagrant file.

Allows a vichan vm to be spun up with "vagrant up".
Vagrant: Make default database settings work.
Vagrant: use cache by default
Vagrant: More informative message after "vagrant up".
Enable some scripts.
Vagrant: Fix issue with restarting.
Vagrant: Make bootstrap script backwards compatible.
Don't freak out over CRLF in install.sql.
Fix API: Swap image width/height, make replies an integer, fix original filename
Fix expanded tabs
update locales
overcome a transifex bug with translation of one string
ajax.js: add ajax_after_post event
fix options.js textareas
show-own-posts.js initial commit
shown-own-posts.js: documentation fix
show-own-posts.js: fix a bug
custom alert: now alert will be able to display custom HTML
show-own-posts.js: remove a debugging expression
Fix upload limits.

nginx limit needs to be tigher than php-fpm limit so that actual errors
are given to users.