Added get"Type"Parameter routines to rrPlugins.py

Added get"Type"Parameter routines to rrPlugins.py, also added
experimental plugins object wrapper that avoids the use of handles
Removed the getRoadRunnerDataHandleFomInstance call
Updated Demo scripts
Merge branch 'develop' of https://github.com/AndySomogyi/roadrunner into more_on_distro
Removed some duplicated get/set methods in rrplugins
Added some misc. casts
Added all the get Methods to the C API

Updated DEmos