Bug: HDFFV-8433
Need to unify Windows release process (zip file) and Unix release process (bin/release-> tarfile)

Solution:
Added a new option (zip) to generate Windows zip file from the release tarball.

Tested: by hand running "bin/release ... gzip zip" to verify zip file looks right.
Allen and Dana then confirmed the zip file can be used to build and test HDF5
library without error.


git-svn-id: https://svn.hdfgroup.uiuc.edu/hdf5/trunk@25096 dab4d1a6-ed17-0410-a064-d1ae371a2980