Replacing "! x" with "!x"
Fix spacing around for/if/while statements.
Changing

if (x) do_something();

to

if (x)
  do_something();

I find the former much more difficult to read for some reason.
Start for/if scope brackets on new line.
At least three spaces between function definitions.
Use consistent indentation throughout file.
No comments between function declaration and opening brace.
Use doxygen style documentation.
Removing arbitrary spacing from class declarations.
Merge branch 'getpot_reformat'