Added single key file reloading.

Sometimes when editing a file an an IDE, I need to perform a bunch of
text manipulations not easily supported by its editor. In these cases,
I use Emacs, which has superior text editing capabilities. As I jump
back and forth between programs, I need to reload the file in Emacs.
In the past, I accomplished this with `revert-buffer'. However,
`revert-buffer' doesn't get a hotkey by default and has an annoying
confirmation prompt. This change adds the custom function
revert-buffer-without-query and assigns it to <f5>. I changed my
custom function `make-unit-tests's hotkey to <f7>.
Made license dates more accurate.