Documentation.

Add piface documentation pdf.
Partial install guide.
network default setting
TestAndReset namespace + doc
AuthFile refactor: namespace
AuthFile module now inherits from BaseModule.

This was the last important module to be migrated to
namespace and reuse BaseModule as a base class to avoid
code duplication. This closes #34.
add picture to install guide
Fix pictures colors
Fix fr mistakes
Base class for auth logic
Auth logic base code p2
Auth logic base code p3
refactor auth logic base code
Exclude generating documentation for libzmq/zmqpp
Auth logic + some doc
missing doc
AuthSource and AuthTarget experiment
first unit test that works. POC of subsystem
Add python test script; update doxyfile
Code organization improvements.

Put unit test, and test helper class in their own namespace. The codebase organization is closer to its physical representation.
Drop unused code.

These are leftover from port to message passing.
Most of this code have been ported to other classes with message
passing in mind.