Update devel/rudiments to 0.55.0.

Major new features:

- Security Framework
  * A securitycontext may now be attached to a filedescriptor to
    enable encrypted reads and writes. The securitycontext class
    is just an interface though, and there are currently gsscontext
    and tlscontext implementations of it.
  * The gsscontext class and associated classes implement a
    wrapper on top of the GSSAPI on Linux/Unix and SSPI on Windows.
    This primarily provides Kerberos encryption and authentication,
    though on Windows it could be used for NTLM as well.
  * The tlscontext class and associated classes implement a wrapper
    on top of OpenSSL on Linux/Unix and, again, SSPI on Windows.
    This provides Transport Layer Security, or it's predecessor Secure
    Socket Layer, on both platforms.
- Thread Class Improvements
- Semantic Versioning
- General Bug Fixes

See full changelog:

  http://software.firstworks.com/2016/03/rudiments-0550-release-announcement.html


(fhajny)