[os_net] declare local variables and functions static
[os_net] add const qualifiers
[os_net] use u_int16_t for ports, mode_t for chmod-mode, and fix some conversion warnings
[os_net] adding nonnull qualifiers and comment out unimplemented function declaration
Merge pull request #304 from cgzones/os_net_fixes

os_net fixes
moving prelude to output dir
 Moving ZeroMQ into Dir
Moving picviz into output
Merge pull request #306 from jrossi/create-output-dir

I have created a output dir in analysis to move some of the output plugins into.
[os_net] fix conversion warnings;
change meaning for return value of 'OS_RecvConnUDP'