Merge pull request #693 from foobit/master

wchar versions of CreateWindowExW WNDCLASSEXW to support unicode text
Detect OS and MODEL properly; default DMD to development ../dmd/src/dmd
Fix FreeBSD/32 model detection
Merge pull request #694 from andralex/makefile

Detect OS and MODEL properly; default DMD to development ../dmd/src/dmd