Create suites package to provide dynamic name-to-ciphersuite maps
Create a (hopefully temporary) fork of the Go standard base64 package,
in order to add support for the standard unpadded base64 format variants.
Add base64 support for raw, unpadded encodings,
and enhance testsuite to test all encodings.
(Previously it wasn't testing the URL encoding.)
Normalize base64 patch to latest go repository
Update base64 wrt latest Go distribution (go1.4 release candidate)
Created more generic cryptographic configuration and key management package;
still just a fairly simplistic starting point.