documented the new feature in srcache_store_skip.

bumped version to 0.24.

updated docs to reflect recent changes.

bumped version to 0.22.

updated docs to reflect recent changes.

updated docs to reflect recent changes; also bumped version to 0.20.

bumped version to 0.19; also added a "Trouble Shooting" section to docs.

reindexed a test case.

bumped version to 0.18.

bumped version to 0.17.