* JAVA FEATURE: Added EraseRecord filter class for dropping records
* JAVA FEATURE: Added exists to KnowledgeBase
* JAVA BUGFIX: Added appropriate detaching logic to filters
* JAVA BUGFIX: Javadocs for 1.8 should now be working correctly
* JAVA TESTS: Added test for EraseRecord (main method within EraseRecord)
* Updated version to 1.9.7

git-svn-id: http://madara.googlecode.com/svn/trunk@1390 2850746a-f1c8-11dd-b507-8b4ecd5210be