Fixed poms, using managed dependency versions
Removed gwt-dev from dependencies; Fixed some imports; Eclipse > Organize imports;
Added check to run UniveralLogger.activate only once per JVM

Signed-off-by: Max Völkel <max.voelkel@calpano.com>
conf: tryToGetAs(Boolean) returns "false" if value is not defined
(instead of throwing an error)

Signed-off-by: Max Völkel <max.voelkel@calpano.com>