PROTON-646: Fix when Perl sets a message body to be BOOL:False.

Had to work around how checking whether a body value was defined would
return false if it were defined but set to false.

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1617835 13f79535-47bb-0310-9956-ffa450edef68
PROTON-650: Added a help option to proton-dump.

If no arguments are provided on the command line then the help output is
displayed.

Also created a manpage from the help output using help2man.

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1618947 13f79535-47bb-0310-9956-ffa450edef68
PROTON-650: use pn_compat utilities for cross platform builds



git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1619102 13f79535-47bb-0310-9956-ffa450edef68