Case (and space) insensitive column headers?

[weavermedia]

It would be good to have a switch for case-insensitive column headers.

Additionally, stripping spaces and other separators from the headers would be useful.

So referencing 'First Name' in the class would match FirstName, first name and first_name etc.

[gnapse]

Good idea. I've thought about it. My only concern would be managing the case where there's more than one column header in the spreadsheet that matches a single column definition in the importer. I'll give some thought to this. Also, pull-requests are welcome.