Usage documentation

[matthewrsj]

Documentation needs to be written on how to make an html form to use formsender.

Some important points:

• Necessary fields
  • tokn - hidden field should match TOKN in formsender's config file
  • hidden - hidden field should be empty
  • redirect - hidden field with redirect url
  • name
  • email

Idea: set up pelican site, run formsender locally and document experience for usage doc.

[matthewrsj]

Fixed by #23