Fix <rdar://5505062> WebKit's version-independent ProgIDs contain version...

    Fix <rdar://5505062> WebKit's version-independent ProgIDs contain version numbers

        I also added a few registry keys for our version-independent ProgIDs
        that we were missing.

        Reviewed by Steve.

        * ProgIDMacros.h: Added new macros to get version-independent ProgIDs.
        * WebKitDLL.cpp: Use the version-independent ProgIDs in the right
        places, and added some new keys for version-independent ProgIDs.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@25928 268f45cc-cd09-0410-ab3c-d52691b4dbfc