[hacc] More commenting.
[hacc] Implement file reloading (untested)
[hacc] Make reloading work.

Now as far as it's tested, file handling works completely, yay!
Add reload command.  It totally works!
[hacc] Optimize reloading time.
[hacc] Remove some profiling prints.
[hacc] Log when reloading a file, like when loading etc.