Adding conditions-error and error supporting.
`diaspora-get-next-oldies` now works. The problem when returning the output buffer from `diaspora-get-url-entry-stream` when maxtime is setted has been corrected.

Added an error message when diaspora-get-stream or simmilar has problems and cannot retrieve information.
Some faces problems has been corrected.
What happens when redirecting in the middle of the auth-token GET?. Diaspora auth-token retrieval corrected.
Problems with dates. If you want to see dates before 1 month(or more) now you can.