doc: fix git/svn url for gyp repo in README
windows: fix fs_read with nbufs > 1 and offset

ReadFile() does not seem to update the offset at all.
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update
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Revert "windows: fix fs_read with nbufs > 1 and offset"

This reverts commit cf8f243e2d6df8e91c34b7d78e99a5bc3db84408.