Patches; how do I commit them?

["Saunders, Brett" <bsaunders@xxxxxxxxxxx>]

Hi There,

  I've made a couple of changes to OIV, and am wondering two things:
    1) Are they worth commiting to the source base?
    2) How do I commit them?

  These are the things I've changed:
    * I've added mouse wheel support to the wheel widgets in SoXt.  This
allows a user to place the mouse over a wheel widget and use the mouse wheel
to move them.
    * I've modified SoXtExaminerViewer so that the mouse wheel zooms the
camera in.  This is great in ivview.
    * I've modified SoTexture2 so that it loads tiff images.  I did this so
that I could load alpha-channel textures.

        -Brett