remove pre-filtering of aah, perseus, election images, and year book
pages
removing from index so the config is untracked
Migrate to ldap
Don't store ldap config
Pinning devise_ldap_authenticatable to a specific commit

Pending a new release of devise_ldap_authenticatable, adding commit ref so unanticipated changes don't creep in unannounced.  Should be changed to point at official rubygems release once it comes out.
Update devise_ldap_authenticatable to a released version
Migrate to ldap
Don't store ldap config
added some excludes to the ignore file
changed url for preview (not sure if this is actually used)
ignore app config
Merge remote branch 'origin/ldap' into ldap