Updating CHANGES
Improving rofl-pipeline documentation. fixes #1
Adding mailing list to main README
Updating CHANGES file for 0.4.1
Changing version to v0.4.1 in VERSION file
Merge branch 'devel-0.4' into devel-0.5

Conflicts:
	VERSION
revised classes cofinstructions and cofinst
renamed class: cofinst => cofinstruction
new test: cofinstruction_test
cofinstructions::unpack() => added missing OFPIT_EXPERIMENTER part
cofinstructions::unpack() => added missing OFPIT_EXPERIMENTER part
cofinstructions::unpack() => added missing OFPIT_EXPERIMENTER part