Merge - bit of last minute stuff

I deleted all third party code as it can be downloaded with the script
v0.3.0 is too old.  The version of JsSIP in the Debian package is built from a branch in JsSIP.  Maybe ask the JsSIP mailing list to publish a newer release for download. @ibc or @jmillan may be able to comment?

As a workaround, the code_grabber script can just grab whatever version is in use at http://freephonebox.net