This puts the flow header after the copyright header.
It also:
* fixes the existing files to have valid headers
* Makes sure the script can handle doctype
Noms SDK users frequently shoot themselves in the foot because they're
holding onto an "old" Database object. That is, they have a Database
tucked away in some internal state, they call Commit() on it, and
don't replace the object in their internal state with the new Database
returned from Commit.
This PR fixes#2589 by changing the Database and Dataset JS API to be
in line with the proposal there.
Erik Arvidsson