PROTON-343: added transport context

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1548123 13f79535-47bb-0310-9956-ffa450edef68
PROTON-260   Improve API rdoc comments for Ruby. 


git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1548607 13f79535-47bb-0310-9956-ffa450edef68
PROTON-475: use seconds-based timeout values

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1549639 13f79535-47bb-0310-9956-ffa450edef68
PROTON-477: Enforce SASL and SSL singletons, fix minor errors flushed out by Pylint

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1550748 13f79535-47bb-0310-9956-ffa450edef68
PROTON-478: added an explicit SETTLED status

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1551950 13f79535-47bb-0310-9956-ffa450edef68
added async examples

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1551951 13f79535-47bb-0310-9956-ffa450edef68