part of isIsAndOrSentence()
added a preposition variable
isIsAndOrSentence() finished. not tested yet.
added a test case of isIsAndOrSentence()
1) added 2 more test cases of isIsAndOrSentence(). 2) fixed a few bugs of isIsAndOrSentencesHelper()
handleAndOr
part of andOrTag()
part of andOrTag()
reset and/or tags
add a new module markupByPOS. Finished a method in it, tagUnknownSentences()
Merge branch 'iss58' into develop