Merge the newest changes from nerdz-template-back
Split templating instructions from the README

Also, add an introduction about the protheme.
Disable the black overlay by default

Mainly because it looks ugly in some pages, and people may not like it.
More margin between the buttons

Looks better on Chrome, a little less on Firefox.
Add the new bbcodes to the autocompletion
Fix wrong behavior when using TAB to autocomplete

Also now the black overlay is REALLY disabled.