[IMP] web: add ace editor for xml and python edition

* display all lines and don't display the scroll bar into ace editor
* lazy read ace lib and add missing lib file
* use not minified version of ace lib
* Move ace lib from website to web
* Added ace widget for webclient
* XML mode for view text box
* Python mode for server action text box
* Removed web_ace_editor.xml, instead added template in base.xml itself
* Added widget=ace_editor in compute field of ir.model.fields