Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

On PX4, under certain circumstances and in rare cases, there can be log
files with 0 size. In that case QGC ignored the entry and tried to
re-request the entry indefinitely.

1. PX4Log parser is split off into its own class
2. New ULog parser implemented

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Conflicts:
	src/MissionManager/GeoFenceController.cc

Conflicts:
	src/AnalyzeView/GeoTagController.cc