Added Groups information to pipeline snapshot
Using read lock when doing snapshot of groups in the pipeline snapshot
Unified of1x_get_group_stats and of1x_get_group_all_stats
Changed of1x_fetch_group_table for of1x_get_group_desc_stats which makes a copy of the whole group structure
Forgotten file
Added of1x_group_types.h to the headers of the library
Fixed unprotected lookup and destroy of the group table
fixed of1x_action_pp.h rdlock in group table also when reading type
Fixed group ID 0 is valid and __of1x_apply_actions_has can find a OF1X_AT_GROUP in a of1x_action_group_t
Merge branch 'devel-0.5' into groups_snapshot

Conflicts:
	src/rofl/datapath/pipeline/openflow/openflow1x/pipeline/of1x_group_table.c