created reserved_names route
moved common template vars to one place
simplified routes from /site/admin and /site/docs to /admin and /docs
created index.md for home page content
added a change password form; removed current_user from session and substituted current_uid due to sqlalchemy weirdness
Revert "removed jquery until such time as it is required"

This reverts commit 8cbf911dc6d334fcfe448dfb099ef9c1e9e01bc7.
minor tweak
made email required for new accounts
improved string/text database mappings; improved slug generator