basic functionality for the mentorship module now works!!!
removed some references to key module, removed option to "edit" mentorship, since this is not implemented yet.
fixed a bug preventing mentorship table from displaying if the contact only had proteges, but did not have a mentor.
fixed some whitespace, added some comments. edit forms still not implemented yet.
Fix bug in user update process.
Adds an amazon payment button to contact account tab.
Modify crm_url() to handle special <front> path.
Fix ipn/abandon/return urls for amazon payment button.
Merge branch 'dev' of https://github.com/elplatt/seltzer into dev