Started minmax, something wrong vis-a-vis visitor
Merge remote-tracking branch 'remotes/scalanlp/master' into minmax
Merge branch 'Constants' into minmax
maxMin completed with tests, bug in ptp code fixed
Update README.md
David's suggestion for better HashMap search, tests written, passing
Merge pull request #193 from ktakagaki/Constants

Constants
Merge branch 'Constants' into minMax2
Don't delete what you don't understand...
Merge pull request #194 from ktakagaki/minMax2

minMax
Merge remote-tracking branch 'remotes/scalanlp/master' into ktakagak_private_material