add of compare_uint32 fun
correct get_ofp_uint48
correct mask for sef oxm type field
correct wrong cstruct

add of pseudoport test

cleaning of arbitrary
add arbitrary fun for ip DSCP & ECN
correct of wrong mask for ip dscp
add instruction test, correct write metadata mask & rec parse for action
add pad for action_header & correct actionsset parsing for instruction
some format cleaning and convert to unix EOL

flowmod : solve cookie mask issue

correct the arbitrary gen for flowmod

add all new test
remove dupplicate cstruct & move cstruct into module
add lib/OpenFlow0x04.mli
merging with dev branch for pull request