added the pattern finding operator
added more test cases
added more checks in the test
improved performance
Squashed changes
1. Added the documentation in more details
2. Fixed all the warnings
Documentation update for com.datatorrent.lib.algo
Documentation update for com.datatorrent.lib.chart
Documentation update for com.datatorrent.lib.db
Commit for review of description,tags,category
Documentation update for com.datatorrent.lib.db.cache
Documentation update for com.datatorrent.lib.db.cache
Documentation update for com.datatorrent.lib.db.jdbc
Documentation update for com.datatorrent.lib.dedup
Commit for Review of Math and Multiwindow operator meta information
Documentation update for com.datatorrent.lib.io
Documentation update for com.datatorrent.lib.io.fs
Documentation update for com.datatorrent.lib.io.jms
Documentation update for com.datatorrent.lib.xml
Documentation update for com.datatorrent.lib.xml