add gitignore file.
Add query filter.
Add parser so that we can handle string arguments to queryFilter.
Add parser to queryFilter.
Rename queryFilter to lessen the possibility of namespace collisions.
Change the test variable name for consistency.
Add query filter demo.
Compiled and minified files.
Add demo for queryFilter.
Add test cases and fix bugs uncovered while implementing demo.
Merge branch 'add-query-filter'