rename: activityGetHandler.php => activityHandler.php
	change get field to post field, and add functions for "Like" and "Comment".

add;
PhpClass/dbBase.php: abstract some db function into a base class

modify:
PhpClass/activity.php: add function for "Like" and "Comment"
PhpClass/keyword.php: bug fix
add old Profile training code (java)
Modify code in ProfileTrainigSrc by kit,  some url and their input, output are changed (Please don't run the testWithDB.java directly)

add file PreProcessing.java. 
	it will get each activity description from DB and get corresponding tf, idf value by requesting bing. it will insert the tf,idf information back to db

add file TrainProfile.java.
	it is the entry point of trainng profile. still under development.
Add PhpClass/solrUpdate.php, an entry point to update solr index

Modify 
 1 .utility.php, PhpClass/solr.php, PhpClass/activity.php: add function to handle solr update.