Two new TeX Live collections

[Ken Brown]

Would someone please add the following two lines to cygwin-pkg-maint?
texlive-collection-mathscience               Ken Brown
texlive-collection-mathscience-doc           Ken Brown

The first obsoletes texlive-collection-mathextra and texlive-collection-science, 
and the second obsoletes texlive-collection-mathextra-doc and 
texlive-collection-science-doc.  I assume the obsolete packages can be removed 
from cygwin-pkg-maint once I've uploaded the new ones.

Thanks.

Ken