Options for modal translation + ajax request Type

Add extra options to translate modal text: title and buttons
Add an option to specify the ajax method type (get, post ...)
update readme

Update readme with new options
Update bootstrap-session-timeout.js
Update bootstrap-session-timeout.js
Update minify version

Update minify version
Merge pull request #5 from xibman/master

Thanks @xibman for the updates. I'm a bit late to merge it, but better late than never :)