rename:
	activityCheck.php => activityCheckHandler.php (also change to post field)
	activityGet.php => activityGetHandler.php (no change)

modify:
activityWordHandler.php: change to post field; value for function selecting is also change
keywordHandler.php: change to post field and add more function
profileHandler.php: change to post field
SimpleActivityInsert.php: change to post field
PhpClass/solr.php: modify output


add:
PhpClass/ActivityWord.php
PhpClass/keyword.php
UnitTest/handlerTest.php
re-structure keywordHandler.php, PhpClass/keyword.php