Initial Commit

Key changes from the original WordPress
* Support for status code 410 on deleted posts
* Added _deleted table to be used in is_410()
* Included 410.php in the theme
and other minor mods
* _term_taxonomy merged into _terms
* defined TIME_NOW to save ~200 queries of time()
* Added _media table for future work
* Removed update functions for previous WordPress versions
* Removed deprecated functions
* Added README.md