added normalized writeprints feature set
Merge branch 'jsan_master' into jstylo_master

Conflicts:
	src/edu/drexel/psal/jstylo/analyzers/writeprints/AuthorWPData.java
	src/edu/drexel/psal/jstylo/analyzers/writeprints/WriteprintsAnalyzer.java
	src/edu/drexel/psal/jstylo/generics/WekaInstancesBuilder.java
updated JStylo file choosers to remember last working directory
fixed single-numeric event drivers bug (not calculating histogram
anymore)
.
added special keys removal canonicizer and special keys mapping file as
resource. the mapping maps special keys like backspace, printscreen etc.
to a unique greek letter identifier. the keys are represented as
output by the ghostmouse logging application.
added ApplySpecialKeys canonicizer
changed test instances author attribute to be set to corresponding
unknownDocument's author if not null, otherwise to the first training
instance's author.
fixed character count event driver
fixed character count event driver
Merge branch 'jsan_master' into jstylo_master
updated problem set to use LinkedList and updated toXMLString and
writeToXML (more efficient now)
Another modification in ProblemSet
Added Treetagger-a language independent pos tagger.
Treetagger has three versions for three os-
1. tree-tagger-linux-3.2-64bit is for linux, 
2. TreeTagger is for windows
3. tree-tagger-MacOSX-3.2-intel is for mac

An example of featureset using tree-tagger is in
jsan/resources/feature_sets/writeprints_russian.xml

Added German and Russian function words.
Another modification in ProblemSet
Merge branch 'jsan_master' into jstylo_master
Merge remote-tracking branch 'origin/jsan_master' into jsan_master
added cross-dataset distance measure in writeprints
writeprints changes
upgraded to Jama-1.0.3 from Jama-1.0.2 (matrix package)
updated some writeprints code