win32 bubbles not showing on some systems

[Antoine Martin]

The code is horrible, but it used to work at least in some cases.

Now it works on my 32-bit windows 7 test system, but not the others...

[Antoine Martin]

Fixes and related changesets in:

• r27823 switch to GetModuleHandleExA
• r27824 debug
• r27825 fix import side effect causing test script failure
• r27826 better ctypes argtypes
• r27827 allow up to the limit given (minor fix)
• r27832 remove XP compat, add 'A'scii function definition
• r27833 make it easier to switch between 'A'scii and 'W'ide variants
• r27834 unify code

For backports, it is probably easier to just take the files wholesale (minus the XP compat code for v3?)

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Hopefully this will fix #2738 and #2920.

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The easiest way to test those notifications bubbles is with the improved test script: r27836.