Add error checking

[frankduncan]

Right no there's no error checking at all. This issue can be a catch all for things that we think of. On the list so far is:

• No error checking on whether a template exists when asking to view
• Templates are case sensitive
• There's no error checking on torque types that are passed in, and whether we respect them
• There's no error checking when uploading attachment that the configured column actually exists in the sheet