Added prependSender field to the CP _settings screen, and wrote its use into the ContactFormController, with the extra field added to the main plugin definition. This allows flexibly and translatably identifying the actual sender by the name s/he providees, given the relay forwarding that Contact Form must use to avoid spam traps at major hosting provideres.
Merge branch 'reliadent' of https://github.com/narration/ContactForm into reliadent

Conflicts:
	README.md