Adds an extra switch_rtp_destroy or switch_rtp_release_port when a session ends - to make sure the port is returned to FS.

FS-2881: SIP-header History-Info might exist multiple times, but only last header is exposed as a channel variable

skypopen: a little bit of constant cleaning, and screening of A-D dtmfs (not accepted bu Skype client) - fix for FS-2891

- Dialplan examples
- New version of commons
- Priority of contexts
- New K3L install script - getk3l.sh
- CLI return in XML
- More options in GET and SET commands
- Events (ESL) to send/receive SMS.
- fax-adjustment-timeout implemented
- accountcode and language
- Owner destroy
- Destroy wait for resources release
- static const expression
- Hangup cause

 Fix issue when fs_path is used so we pick the correct media IP in our outbound invite this was soemthing that wouldn't work correctly over ATT on the iphone.

add uuid_fileman <uuid> <cmd>:<val> <-- same vals as the callbacks in js and lua to control the currently playing file of a channel from the cli or ESL (for the people who were ignoring me on the conference call so I decided to implement it instead of try to explain it )