Add password change form, clean up code.

Add form allowing logged-in users to change their password.
	Form has no logic.
Tweak code to be more readable.
	Add an extra line between functions.
	Split long lines over two lines.
	Move <br> tags from their own lines to the end of the prior
	line.
Add to gitignore

Add vim .swp autosave files to gitignore.
Add .pyc compile python files to gitgnore.
Clean up register function

Remove a lot of if-nesting.
Add comments describing flow.
Split long lines into mutliple lines.
Clean up registration form.

Change password fields from plaintext to password.
Make success page look a bit nicer by putting username in the h3.
Clean up home and wittle functions.

Change from if-else format to use if-return format.
Clean up login function, rename login pages.

Remove as much if-else nesting as possible in the login function.
Rename login.html and whoops.html to login-failure.html and
login-form.html to be more understandable from just an ls.