Rewrite the Compiler detection tests for deprecation and unused. Simplify and make more safe, clang or compilers supporting __has_extension() and __has_attribute() should work perfectly. There are now GCC version tests for all these features, however there seems to be some disagreement online about which GCC versions introduced these features, so I picked the versions that I felt had the highest consensus. Can revisit the specific versions if new information is available: unused attribute: GCC 3.1 (BSD seems to think 2.7) deprecated attribute: GCC 3.2 (Hedley seems to think 4.0) deprecated with message attribute: GCC 4.5

This package contains Dynamic Windows (dwindows) v 3.0 for Windows.

It contains:

dw.dll - main dwindows DLL
dwcompat.dll - compatibility DLL (optional)
dw.h - header file
dw.lib - import library for functions in dw.dll
dwcompat.lib - import library for functions in dwcompat.dll
readme-win.txt - this file