More flexible cameras.yaml

[Blattvorhang]

Changed h5_to_db.py, cameras.yaml now supports globbing and custom intrinsics.

Example:

general:
  camera_model: "pinhole" # ["simple-pinhole", "pinhole", "simple-radial", "opencv"]
  openmvg_camera_model: "pinhole_radial_k3" # ["pinhole", "pinhole_radial_k3", "pinhole_brown_t2"]
  single_camera: True
  intrinsics: ~  # None

cam0:
  camera_model: "pinhole"
  intrinsics: [
    481.14, 478.43, 481.44, 383.72
  ]
  images : "cam0_*.jpg"

cam1:
  camera_model: "opencv"
  intrinsics: [
    481.91, 482.20, 482.70, 384.33,
    0.0, 0.0, 0.0, 0.0
  ]
  images : "cam1_*.jpg"