Computation status now stored as object,  and also retrieved from resulting zoo xml file. Scheduling the computation in zoo is also now done automatically after each computation is created
Updated ajax code to update status - now takes status code
Added check for number of datafiles in form.
Moved check for number of datafiles in form to view.
Merge branch 'master' into climateanalyser
Moved check for data files back to form, but this time use self.data instead of request object so the code is can be used by admin backend. This is the correct and awesome way of doing it, woohoo!