Add the top-level NEWS file as a "change log" page in the documentation.
Allow the metadata to be dumped, use "metadata:" consistently as the public URI for the metadata.

refs #1021
Simplify URI handling in utilities: accept most things the user provides, let the API tell us if it is invalid.

refs #1021
Change WT_METADATA_URI to "metadata:".
Merge pull request #1026 from wiredtiger/metadata-cleanup

Metadata cleanup
Merge branch 'develop' into doc-changelog
Merge pull request #1025 from wiredtiger/dump-metadata

Allow the metadata to be dumped, use "metadata:" consistently
Fix a numbered list that triggered markdown
Simplify navigation through the docs: don't mix @section and @subpage.
Fix compatibility with newer versions of doxygen.
Merge pull request #1027 from wiredtiger/doc-changelog

Get the change log into the documentation