Update the plugin description header to be more accurate
Points logs: remove logs and meta for a user on deletion

Fixes #13
Points logs: remove logs and meta for a blog on deletion

Inspired by #13 / 318df5e3c2aeb772b482e974808e3eb7e41e78e3
Multiste: store user points separate for different sites when not network-active

When network active, as on non-multisite, the points for a user are
stored in user meta under a key universal to the whole network. Now
when the plugin is active only on single sites on a network, the points
for the user are stored separately for each site, by prefixing the meta
key with the blog prefix.

See #1
Uninstall tests: unhook the function to delete the logs for a blog

Since the logs tables were deleted on uninstall, when the uninstall
tests framework cleans up by deleting a blog, the attempt to clean up
the logs tables will just result in DB errors.
Squashed 'tests/phpunit/includes/uninstall/' changes from 2caae35..7444127

7444127 uninstall(): update the _drop_temporary_table/s function name
e548875 README: fix a typo

git-subtree-dir: tests/phpunit/includes/uninstall
git-subtree-split: 7444127bf6eeb63f6f2fbb86a4bbf85dcfd5945c
Merge commit 'e9c8ed644460a695adf0b7a6d517dd953d237b06'