Yes Flourish does support reading from views, simply use SQL with fDatabase::query() and select what you want from your views. fActiveRecord does not support views because, well, it is an active record implementation and is largely built to support putting data into the database, and most views are not writable. If you are looking for object access to results from fDatabase, check out fResult::asObjects().
In terms of stored procedures, you'll just need to use the SQL syntax your database of choice has for invoking store procedures.