[NaCl SDK] Enable bash completion for python-based command line tools.

Also, add a top level docstring to create_nmf.py.

R=binji@chromium.org

Review URL: https://codereview.chromium.org/53833002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232136 0039d316-1c4b-4281-b951-d872f2087c98
Revert 232131 "CT: First step towards supporting Certificate Tra..."

> CT: First step towards supporting Certificate Transparency in Chrome.
> 
> This patch adds Signed Certificate Timestamp (SCT) encoding/decoding.
> SCT is the Certificate Transparency (CT) structure containing a proof
> of a public log's commitment to adding a certificate to its public
> repository.
> 
> The next patches would be extracting the SCTs when embedded in
> certificates and verifying the signature from the SCT over them.
> 
> BUG=309578
> 
> Review URL: https://codereview.chromium.org/37633002

TBR=eranm@google.com

Review URL: https://codereview.chromium.org/47923017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232137 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232136
SVN changes up to revision 232137