signup.php correctly posting to old Brigade members form
Generic signup form now posting as well
Mobile signup form now posting as well
Switched to normal form POST in brigade overlay
Switched to normal form POST in mobile and generic signups
Moved thank-you text to signup.php
Overhauled appearance of signup form response
Added missing base_url definitions
Moved thank-you text to a new page after 303 See Other
Added basic HTML form for captains
Removed brigade_id input from local signup form
Replaced weird form element names with shorter, nicer 'name' and 'email'
Merge remote-tracking branch 'origin/master' into absorb-signup-form

Conflicts:
	list-brigades.php
	overlay-home.php
Replaced weird form element name with shorter, nicer 'work_in_government'
Removed source=brigade requirement for signup form
Deleted commented-out Javascript