Remove array typecast. It's checked earlier so this is unneeded
Allow uploading coda files to be processed by Factr

Attention, this commit makes it so that you can't upload files during a
POST request and fix the numeric indexes in http parameters at the same
time. In fact, CURL doesn't let us do that. It allows us to either send
a file, or fix the query string, but not both. That's why from now on,
no POST requests can contain files AND remove numerical HTTP parameters.

example of those numerical parameters:

foo[0]=bar&foo[1]=baz   =>  foo[]=bar&foo[]=baz
Merge pull request #5 from sumocoders/feature-upload-coda-files

Feature upload coda files