db project updates:
 - save separate schema comparisons so I don't have to swap targets so much
 - add Tags / PostTags tables
 - make sure ExternalLogins has creationdate column
modify the DAL to make it easier to profile
implement new post form (and saving to db).  closes #1
cleanup template code I'm not using
Merge branch 'master' of https://github.com/aggieben/blog