Reverted call to loglog to System.err so logback users can also use the
debug command.

All loglog.error does is print to System.err anyway
http://grepcode.com/file/repo1.maven.org/maven2/log4j/log4j/1.2.17/org/apache/log4j/helpers/LogLog.java?av=f#124
Removed Changes regarding LINE_SEP from QUEUE_OVERFLOW and INVALID_TOKEN

Also removed boolean log4jPresent, as no longer needed.
Merge pull request #31 from Stexxen/logback-debug-support

Reverted call to loglog to System.err so logback users can also use the debug command.