add BIMS model, view and upload form to GeoNode

[gubuntu]

Create flat model based on the attached data sheet, with a simple tabular view and an upload form to add more records via Excel upload.

Add as an extra page in GeoNode, with navigation from main menu

Data_Sheet.xlsx

@cchristelis can you look as assigning Irwan (or alternative) to this some time before 30 May?

[cchristelis]

@ann26, please split his up into the various subtasks:

• [x] Adding app [call it BIMS]
• [x] Adding data model
• [x] Adding upload form view
• [x] Adding an view data view

[gubuntu]

@ann26 our meeting has moved to Thurs so see if you can finish this by tomorrow so we have time to deploy it