Changes to support the PORT_TYPE_PEX
Added two functions to the pex driver
Adding PEX code into ROFL
Merge remote-tracking branch 'origin/devel-0.4' into ivano/frog
Merge remote-tracking branch 'origin/devel-0.5' into ivano/frog

Conflicts:
	VERSION
Merge remote-tracking branch 'origin/devel-0.5' into ivano/frog
Changed the API of the driver to create NF ports.
Merge remote-tracking branch 'origin/devel-0.5' into ivano/frog
Merge remote-tracking branch 'origin/devel-0.5' into ivano/frog
Merge remote-tracking branch 'origin/devel-0.5' into ivano/frog
Added a new type of port (KNI port)
Merge remote-tracking branch 'origin/devel-0.5' into ivano/frog
Merge remote-tracking branch 'origin/devel-0.5' into ivano/frog
Reorganizing PEX enum in switch_port.h
Merge branch 'ivano/frog' of https://github.com/bisdn/rofl-core into ivano/frog
Code cleanup of the pex part
Still pex related code cleanup
Merge remote-tracking branch 'origin/devel-0.5' into measurements
Merge remote-tracking branch 'origin/devel-0.5' into measurements
Merge remote-tracking branch 'origin/devel-0.5' into ivano/frog