add OF 1.4 to default version list
openflow_input: rename OF 1.4 match to match_v3

This matches OF 1.3. We should probably rename this struct to match_oxm.
openflow_input: fix of_instruction_goto_table definition

The OF 1.4.0 spec says it has a table_id and padding just like in OF 1.3. I'm
not sure where the exp_data came from.
test_data: add first of14 testcase
pyloxi: add support for OF 1.4
openflow_input: fix port stats reply entry
test_data: add port stats reply testcase
openflow_input: add of_port_desc_prop_ethernet to standard-1.4
test_data: add OF 1.4 port_desc_stats_reply testcase
Merge pull request #322 from rlane/of14-pyloxi

[of14] Add OF 1.4 support to the python backend