Use the correct port for GoldSrc master servers

See koraktor/steam-condenser#218
Fixed Web API calls without key

See koraktor/steam-condenser#219
Implemented WebApi.getInterfaces()
DRYed up Web API tests
Add test for Web API without key
Updated logging to use slf4j and log4j

See koraktor/steam-condenser#182
Do not depend on slf4j-log4j directly

As a library, we should leave the decision for a logging framework to
the application developer.
Add a README note on logging
Merge branch 'issue-182'
Make RCON termination conditional

Only non-empty RCON replies will be accompanied by a termination
request. This will prevent timeouts during `changelevel` and similar
commands.

See koraktor/steam-condenser#221
Fix trailing whitespace
Version bump to 1.3.6
Merge branch '1.3-stable'

Conflicts:
	src/main/java/com/github/koraktor/steamcondenser/steam/community/WebApi.java
	src/main/java/com/github/koraktor/steamcondenser/steam/servers/MasterServer.java
Add support for additional group information

See koraktor/steam-condenser#225
Workaround for profiles without join year

See koraktor/steam-condenser#226
Version bump to 1.3.7
Merge branch '1.3-stable'
Refactored packages
Removed full qualified references introduced by 4b32d735fd7b87ef4b80f2e37b95196b9059c23a
Merge remote-tracking branch 'koraktor/master'