NO-JIRA: Removed incorrect rdoc for Messenger accept and reject.

The rdocs still listed flag as an argument even though no such argument
is accepted in the methods.

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1525958 13f79535-47bb-0310-9956-ffa450edef68
PROTON-427: Removed the flag argument from Messenger.settle

Made the API more consistent with the accept and reject methods.

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1525959 13f79535-47bb-0310-9956-ffa450edef68
NO-JIRA: Removed the unused valid_flag? method from Qpid::Proton::Tracker

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1525960 13f79535-47bb-0310-9956-ffa450edef68
PROTON-424: fixed memory leak when freeing non stopped messengers

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1526554 13f79535-47bb-0310-9956-ffa450edef68
PROTON-430: cmake files written to wrong place(s)
Add white space to make file names more visible



git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1526673 13f79535-47bb-0310-9956-ffa450edef68
removed unused union field

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1526860 13f79535-47bb-0310-9956-ffa450edef68
Modified the engine to track how much credit is drained vs used. This should simplify PROTON-200.

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1527535 13f79535-47bb-0310-9956-ffa450edef68
PROTON-375: added pn_link_draining/Receiver.draining()

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1527576 13f79535-47bb-0310-9956-ffa450edef68