New winetricks 20091213: ie6 and gecko fixed; new verbs vcrun6sp6, python-comtypes, richtx32; less restrictive art2kmin, clearer license text.

[Dan Kegel]

Austin and Andrew have been hard at work keeping winetricks working smoothly.
In particular, the ie6 and gecko verbs should work again.
Thanks guys!

Changes since 20091125:

Austin English:
Workaround wine bug for IE6
Update shockwave sha1sum
Add python-comtypes verb
Explain windows licensing a bit better
Gdiplus no longer comes from powerpoint viewer, update description accordingly
Update DivX to latest version, remove obsolete /silent option
Make append_path work if called more than once
When installing gecko, regsvr32 mshtml afterward, so it actually works
Update KDE to 0.9.6-5
When using native mdac, also override oledb32
Bump artk2min to 2007 Access runtime (freely redistributable, wooo!)

Andrew Nguyen:
Update flash to latest version.
Check more exit codes.
Update the vb6run verb to use the Service Pack 6 variant.
Revise vcrun6 verb to remove more fake DLLs and more simply extract mfc42u.dll.
Add vcrun6sp6 verb. (New verb rather than update of vcrun6 as it's a
huge download.)
Add richtx32 verb.

Dan Kegel:
Add heapcheck verb (for use with the not-yet-committed heapcheck patches)
Avoid double-trying regedit

Online as always at
 http://kegel.com/wine/winetricks
or
 http://winezeug.googlecode.com
(Bug reports to the issue tracker at the above URL, please.)