Maven: remove c&p left-over [fix]
remove schema.xml, as the structure is auto-generated by JPA
server version -> protocol version in the welcome message

Introduces a (used) lobby protocol setting, and send its value
in the TASSERVER (welcome) message, instead of the actual server message.

This commit has the side effect of changing the value sent to client
in the welcome message from 0.37 to 0.35 again, which allows TASClient
to connect successfully.
do not crash on white-space-only lines received from clients (thanks knorke!) [fix]
properly clean carriage-return chars out of lines received from clients (thanks Zydox!) [fix]
cleanup the README a bit [minor]
add SNAPSHOT release instructions to the README
move some log messages from level DEBUG to TRACE
white-space cleanup in IPRange [minor]
no longer produce/log an exception in case of a failure to resolve IP to a country code
log only the message instead of whole exception in some places
typo in README [minor]
require maven 2.2.1+ (earlier versions generate bad GPG checksums)
Maven: aggregate PMD & CPD reports

Aggregating is the default for all other report plugins.
Maven: update lots of plugin versions
adjust to new OSGi specs [fix]
Maven: switch the parent from sonatype to com.springrts:parent:1.1
adjust some comments referring to outdated/moved documentation files [minor]
make admin/moderator guidelines markdown formatted [minor]
reference latest protocol master & remove README content that was moved to protocol doc [minor]