#270 + #271: Added OpenGL32 support.

This is #270, #271. I fixed minor problems and ran `dos2unix` on all files, which fixed the line endings. 

There's a unit test failure:

```
    [junit] ------------- Standard Output ---------------
    [junit] GL_VENDOR=null
    [junit] GL_EXTENSIONS=GL_WIN_swap_hint GL_EXT_bgra GL_EXT_paletted_texture
    [junit] GL_VERSION=1.1.0
    [junit] GL_RENDERER=GDI Generic
    [junit] ------------- ---------------- ---------------
    [junit] Testcase: testGetStringGLVendor(com.sun.jna.platform.win32.OpenGL32Test):   FAILED
    [junit] Could not get GL_VENDOR
    [junit] junit.framework.AssertionFailedError: Could not get GL_VENDOR
    [junit]     at com.sun.jna.platform.win32.OpenGL32Test.testGetStringGLVendor(OpenGL32Test.java:115)
    [junit]
    [junit]
```

@kc7bfi - how do we fix this?