Merge pull request #559 from jtakayama/vagrant-documentation

Vagrant and memcached documentation changes, and updates to install/ scripts.
Merge pull request #560 from jtakayama/vagrant-documentation

Vagrant documentation fixes, removal of install/ scripts
the golow activity should exist in the grid
fixed submitted_some_of_level predicate
Fixed Bonus Points admin interface error.
Merge branch 'master' of https://github.com/csdl/makahiki