Removed raw State pointers in favour of unique_ptrs
Avoid allowing control flow to re-enter States that have exited
Defer releasing states until the end of the frame
They served no purpose other than to awkwardly implement weapon firing
This is now handled in the Weapon::fire* functions, and everything else
has been changed to reference weapon data or inventory indices directly
The game indexes into the font map directly, it doesn't use any font
encoding scheme like UTF-16. This corrects the behaviour and removes
dependancy on iconv.
