Merge pull request #8 from JCavallo/master

Add client error handling section
Update access_management.rst
Fixed line wrap of access_management.rst.
Merge pull request #9 from JonLevy/patch-2

Acess right management documentation
Improve Using Tryton client page:

 - Add info about using the desktop client
 - Add toolbar options and some Tips and Tricks
 - Add options and attachments on client usage
Fix jean comments
Merge pull request #11 from pokoli/user_guide_improvements

Improve Using Tryton client page:
Added documentation for tryton client searching
Merge pull request #12 from prakashpp/master

Added documentation for tryton client searching