Add prod logging format to logger, fix debug arg

Previously it was just displaying the message, but by adding the
standard Flask production error format to app.logger, we get better
error messages.

store_const is incorrect, it should be store_true (was throwing an
error when running TwitterSA from command line)
Add form infrastructure and associated templates

Can now input in query strings and get back specialized pages.

Created layout.html which holds the layout of the page.

Also get rid of hello tweets on index page, and update docstrings