add p0tables definition header
replace hard-coded offsets with struct references
change p0table struct as suggested by ck
Merge branch 'ir_iso_transfer' into p0table

Conflicts:
	examples/protonect/src/cpu_depth_packet_processor.cpp
move p0 table definitions to header dir
Merge pull request #2 from floe/p0table

access p0table via struct definition instead of hard-coded offsets