Introduce in_key_down() to check key up/down state
Remove dummy code
Send WM_KEYDOWN and WM_KEYUP too, not just WM_CHAR. Also use a count loop.
Handle GetKeyboardState() failure
Add make.sh script and README.dist for distributed zip files
Merge pull request #5 from lewtds/master

Fix various problems with backspaces and control/alt keys