[galaxy-commits] commit/galaxy-central: greg: Add a new RepositoryGridFilterManager to the Tool Shed framework to support filtering the repositories displayed in the many Tool Shed grids. The current filters are CERTIFIED_LEVEL_ONE, CERTIFIED_LEVEL_ONE_SUITE and CERTIFIED_LEVEL_TWO, CERTIFIED_LEVEL_TWO_SUITE. The "level one" filters display repositories or suites that have been certified by the Tool Shed's install and test framework. The "level two" filters are not yet supported (the query enhancements are