add ofp_version constant value
add setting of default attributes in object properties
fix problem introduced by setting default attributes
define messages under the Trema module
define instructions under Trema module
convert hashes to ruby2.0 format
define actions under the Trema module
Port Trema's hello_spec.rb. The :xid => option is still pending.
add alias definition to trema object attributes
add additional version check
switch to ruby2.0 hash style definition and add version check
add alias port attribute
correct error message
correct port number size and error messages
delete obsolete file
refactoring of network block to mock controller class
add rspecs for SendOutPort and ArpOp actions
merge fix of issue#38
set the subject to receive its value from let
merge this rspec from trema