OPENNLP-703 Improved NegLogLikelihood so that it runs faster and uses less memory

git-svn-id: https://svn.apache.org/repos/asf/opennlp/trunk@1612182 13f79535-47bb-0310-9956-ffa450edef68
OPENNLP-703 Added a parallel version of NegLogLikelihood. Added a test case for it. Updated the parameter list of MaxentQN.

git-svn-id: https://svn.apache.org/repos/asf/opennlp/trunk@1612184 13f79535-47bb-0310-9956-ffa450edef68
Add option to replace polish letter with corresponding ascii ones.
OPENNLP-704 Fixed a bug in SentenceDetectorTool where performance monitor is not started. Thanks to Eugen Hanussek for providing the fix.

git-svn-id: https://svn.apache.org/repos/asf/opennlp/trunk@1615859 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'upstream/trunk' into NKJP_corpus