update Russian lang
AssetMaker now can inject external assets

Calling `addJs()`, `addCss()` and `addRss()` in components starting
with https/http or double slash (//) will now reference to the
appropriate URL.
Fixes #259
Convert all boolean table columnns to use is_ prefix
Add email template/layout system
Merge pull request #258 from hariadi/dev

AssetMaker now can inject external assets
Minor improvement
Add the ability to send a test message
Overriding emails with templates now works
Failsafe fix
Update framework.js

Added prepend option '^' for AJAX framework "data-request-update" parameter
Added pt-br language
Merge pull request #270 from john-mark-wilkinson/master

Update framework.js
Merge pull request #271 from OctoDevel/master

Add pt-br language for backend
Minor
Fixes #255 - Adds a code editor settings page
Email layouts now work
Form fields now support context in their names