Make tpl2tc.py actually generate the checked-in files

The newline changes in .tpl files and tpl2tc.py may look unrelated, but
without them there were (other, uglier) newline changes when regenerating.

Note that preload-metadata-buffered-ogg.html has been manually modified
and is excluded in common.py, so it has not been touched.
Merge pull request #2 from foolip/tpl2tc

Make tpl2tc.py actually generate the checked-in files