Moved My IP Address SX plugin to c2s source
Prepare Semantic Versioning (http://semver.org/)
Replace ChangeLog with link to GitHub commit log

There's no point in manually redoing the work which software
does "for free".
Updated NEWS
Removed UPGRADE file from EXTRA_DIST
Marked "TLS-Everywhere" as EXPERIMENTAL feature

Also:
- default EXPERIMENTAL to 'no'
- default SUPERSEDED to 'no'
- moved STANZA-ACK and MY-IP-ADDRESS XEPs and IQ-PRIVATE push
  out of experimental status
Fixed config test compilation
Updated NEWS
Fixed cyrus_sasl backend compilation

By removing Apple specific code.
Removed unmaintained CyrusSASL backend
Fixed os_type_INTEGER handling in PostgreSQL

Closes #48
Merge pull request #1 from jabberd2/master

Merge jabberd2