Add new MethodFilter implementation with nre generic filter
More methods for MethodFilter
Reimplement the new MethodFilter and creat corrsponding Tests
Code cleanup
Remove @Test from TestCoverage.testCoverage() method

This is done because if you run all tests on a project without any test suites the test will fail because junit does not
allow multiple contructors
Change readme: Add new info that use of testCoverage has changed
Creating new impl of MethodFilter