Prepare for 0.18.1 release.
Fixed issue with overlapping text and timestamp.
Added hints about autoconf automake.
Use autoconf macro to compare versions.
This should fix problems on systems where `find` doesn't know how to sort version numbers.
Fixed STUN config example to actually work.
Merge pull request #41 from fancycode/autoconf_version_check

Use autoconf macro to compare versions.
Improved check for compass inside sass.
Merge pull request #42 from fancycode/autoconf_compass_check

Improved check for compass inside sass.
Defer bootstrap also when loading no translation to make sure plugins are loaded first.
Validad useridcombo value properly.
Do not bail if no Authentication was sent.
Fixed content/type detection to use prefix matching in case the content/type header is sent with charset suffix.
Make sure to send content/type.
Defined and implemented contact request/response protocol and data structure.
Implemented first simple Ui for contacts in chat.
Fixed nil pointer.
Started end points for contact storage.
Updated autocall feature to reflect API changes for contacts.
Do not allow to send contact requests to own userid sessions.
Implemented support to request and accept contacts when in a call with that contact.