Aravis 0.8.23

• python: fix crash in stream callback #714 (@lostcontrol)
• gv: multipart support (@EmmanuelP)
• gv: chunk data payload support (@EmmanuelP)
• gv: use the trailer packet for expected data size calculation (@EmmanuelP)
• gv: reset SCPx register on stream finalization (@EmmanuelP)
• gv: API to allow discovery ack broadcast (@EmmanuelP)
• gv: add more legacy endianness entries (@TomohisaAzegami, Radim, @EmmanuelP)
• gv: fix infinite loop in auto packet size (@EmmanuelP)
• gv: don't use source port in socket packet mode (@EmmanuelP)
• genicam: AccessMode improvements (@EmmanuelP)
• camera: add a Component API (@EmmanuelP)
• buffer: part access API (@EmmanuelP)
• cameratest: allow to set features from a string (@EmmanuelP)
• ci: windows build fixes (@Fixstars-momoko, @EmmanuelP)
• doc: improvements (@mshr-r, @EmmanuelP)