Added checks for whether page is connect.
changed global variable name.
added devel check to catch bad URLs.

Fixed a bug in canvas page form submits.  And made default handling easier to customize and better documented.

Admin settings to disable post-processing.

Use constants for perms.

Disable install time requirements.  They prevent fb.module from being enabled, but allow modules which depend on fb.  This causes lots of grief.

big changes to session handling.  Fixed at least one bug, hopefully did not break anything in the process.

Also, settings to control theme overrides.

Easier to migrate config between devel and live servers this way.

improved (?) header markup and styles.
Other misc changes.