Added status to Computation
added ajax view for zoo to update a computation's status
Add check to see if objects exists in ajax functions.
Added status to computation templates.
Updated ajax view for computation status. it now takes rsa-encrypted strings
Changed name of DataFile field 'metadata' to more descriptively accurate 'variables'.
Making sure all exceptions are handled and just a simple 'failure' message is printed
Merge branch 'climateanalyser'
Merge branch 'master' of https://github.com/climate-analyser-team/bom-frontend
Fixed up code style to only use 80 chars/line

Also ensured consistent 3-space tabs.
Merge remote branch 'upstream/master' into 80chars

Conflicts:
	climateanalyser/admin.py
	climateanalyser/urls.py
	static/climateanalyser/js/computationdataform.js
	zooadapter/models.py
Merge pull request #12 from Andrew-Dunn/80chars

Fixed up code to only use 80 chars/line