re #183: Exclude internal methods in options action
Block MS Office authentication requests with a 405.

See http://support.microsoft.com/kb/2019105 for more information
re #183: Make options action call safer
re #183: Throw a 405 exception if the method passed to dispatch action is not implemented
re #183: Check against and disallow a list of internal methods in dispatch action
re #183: Only allow methods to be dispatched if they are listed in the dispatcher configuration
Merge branch 'feature/183-options' into develop