QuestionAnswerCandSentSimilarityMatcher is added
QuestionAnswer matcher is added.
QuestionAnswerQuery
Merge branch 'master' into QuestionAnswerQueryLaleh
merged to master
the xml for QuestionAnswerMatcher
Merge branch 'master' of https://github.com/GeeUnit/hw5-team07

Conflicts:
	qa4mre-alzheimer-task/XMIs/12-test-alzheimer/QA4MRE-2012_BIOMEDICAL_GS.xml_1.xmi
	qa4mre-alzheimer-task/XMIs/12-test-alzheimer/QA4MRE-2012_BIOMEDICAL_GS.xml_2.xmi
	qa4mre-alzheimer-task/XMIs/12-test-alzheimer/QA4MRE-2012_BIOMEDICAL_GS.xml_3.xmi
	qa4mre-alzheimer-task/XMIs/12-test-alzheimer/QA4MRE-2012_BIOMEDICAL_GS.xml_4.xmi