New web service to access to VPL
Adapted to use new edit.class.php
Removed context check
Add funtions to manage web service tokens
Update version number
Add link to web service URL generator page
Generate and show URL web service with token
Added parm to pass_password_check($password) to add the option of get
the password by other ways
Regular Expressions and reorganization of code developed by:
 * Daniel José Ojeda Loisel
 * Juan David Vega Rodríguez
 * Miguel Ángel Viera González
Generate and show URL web service with token
Text fix
Removed replicated const
Reorder code