registration and authentication mechanism
sends PRE-REGISTER to directory and uses the returned nonce to challenge
the registrant (openbts is the use case here). this will allow for the
directory to be disconnected from kazoo and still keep working, even
with authentication.

adds extra headers to help make decisions on kazoo

adds extra headers and parameters to BLIND-AUTH during INVITE. the use
is once again openbts thast doesn't work with challenge/response on
invites.
change name of event from BLIND to BLIND-REGISTER
xml_cache in seconds
'cacheable' parameter arrives in ms instead of seconds
apply-pre-register-acl
apply-blind-auth-acl
enable-pre-register
xml_cache enhancements
presence bug
PFLAG_ENABLE_PRESENCE_FIND_BY_NUMBER_ALIAS
PFLAG_ENABLE_PRESENCE_FIND_BY_NUMBER_ALIAS
PFLAG_ENABLE_PRESENCE_FIND_BY_NUMBER_ALIAS
PFLAG_ENABLE_PRESENCE_FIND_BY_NUMBER_ALIAS
xml_cache
Merge pull request #5 from 2600hz/KAZOO-2226

Kazoo 2226