Added a new class POSInfo to represent POS Info. It is used in method getPOSptn and method checkPOSInfo. Finished method getPOSptn and method checkPOSInfo.
Added two cases in doIt method.
test method checkWN systematically. Added test cases. Fixed bugs. Now most have been tested except only one case left. I need to further confirm how it should handle the case.
Issue 15 & 16
Added a few test cases of getNumber method.
Added a number of test cases. Tested getPlural thoroughly. Fixed a few bugs.
Method getSingular has been tested systematically. Several test cases were added.
Fully tested methods addStopWords, addCharacters, addNumbers, addClusterstrings, addProperNouns.
Encapsulated methods checkWN, getNumber, getSingular, and getPlural into one class. The name of the class is WordFormUtility. Created a test class of it, WordFormUtilityTest. Moved test cases of those methods into it.
Merge pull request #18 from dongyemeng/master

Merge lastest