Update dependencies and scala versions.
Prepare for release of 2.4.3.
Prepare for development of 2.4.4-SNAPSHOT.
Generalize Tokenizer.originalText.
Update README.md
Add pgp plugin.
Update sbt-assembly plugin.
fixup for Tokenizer.
Update README.md
Add headwork project stub
Fix assertion message.
Correct test case name.
Skip over control characters when computing offsets.
Merge pull request #17 from knowitall/clean

Skip over control characters when computing offsets.
Merge branch 'headword' of https://github.com/gmjabs/nlptools into headword
Use symbols internally for postags and chunk tags.
Add headword extraction and wordnet utils (over jwi) to nlptools.
- Declare HeadExtractor interface, rename UW implementation to UWHeadExtractor.
- UWHeadExtractor cleanup
- Add whWords and tag type tests to Postagger and PostaggedToken
Add headwork project stub
Add headword extraction and wordnet utils (over jwi) to nlptools.