Authenticates the caller

Log the caller out

Register a new user

Return a list of guessed locations based on ip

Return a list of nearby locations based on coordinates

Set the user location

Add an interest

Delete an interest

Return a list of interests

Add a course

Delete a course

Return a list of courses

Add a friend

Delete a friend

Return a list of friends

Ping server for updates

Send a message to another user

Set the wall for the current location

Get userinfo for the specified user

Set userinfo of the caller