Parse syntax to understand inheritance

[DenizUgur]

This solves #19
With this change, the following boxes' container values will be expanded to reflect the actual container types.

Changed boxes

mdcv VisualSampleEntry 4
[
  "HEVCSampleEntry",
  "VisualSampleEntry",
  "AVCSampleEntry",
  "AVC2SampleEntry"
]
rinf SampleEntry 7
[
  "HintSampleEntry",
  "VisualSampleEntry",
  "MetaDataSampleEntry",
  "HEVCSampleEntry",
  "AVCSampleEntry",
  "AVC2SampleEntry",
  "SampleEntry"
]
pasp VisualSampleEntry 4
[
  "HEVCSampleEntry",
  "VisualSampleEntry",
  "AVCSampleEntry",
  "AVC2SampleEntry"
]
scrb SampleEntry 7
[
  "HintSampleEntry",
  "VisualSampleEntry",
  "MetaDataSampleEntry",
  "HEVCSampleEntry",
  "AVCSampleEntry",
  "AVC2SampleEntry",
  "SampleEntry"
]
clli VisualSampleEntry 4
[
  "HEVCSampleEntry",
  "VisualSampleEntry",
  "AVCSampleEntry",
  "AVC2SampleEntry"
]
btrt SampleEntry 7
[
  "HintSampleEntry",
  "VisualSampleEntry",
  "MetaDataSampleEntry",
  "HEVCSampleEntry",
  "AVCSampleEntry",
  "AVC2SampleEntry",
  "SampleEntry"
]
clap VisualSampleEntry 4
[
  "HEVCSampleEntry",
  "VisualSampleEntry",
  "AVCSampleEntry",
  "AVC2SampleEntry"
]
sinf SampleEntry 7
[
  "HintSampleEntry",
  "VisualSampleEntry",
  "MetaDataSampleEntry",
  "HEVCSampleEntry",
  "AVCSampleEntry",
  "AVC2SampleEntry",
  "SampleEntry"
]
colr VisualSampleEntry 4
[
  "HEVCSampleEntry",
  "VisualSampleEntry",
  "AVCSampleEntry",
  "AVC2SampleEntry"
]
cclv VisualSampleEntry 4
[
  "HEVCSampleEntry",
  "VisualSampleEntry",
  "AVCSampleEntry",
  "AVC2SampleEntry"
]
seii VisualSampleEntry 4
[
  "HEVCSampleEntry",
  "VisualSampleEntry",
  "AVCSampleEntry",
  "AVC2SampleEntry"
]
ccst SampleEntry 7
[
  "HintSampleEntry",
  "VisualSampleEntry",
  "MetaDataSampleEntry",
  "HEVCSampleEntry",
  "AVCSampleEntry",
  "AVC2SampleEntry",
  "SampleEntry"
]
auxi SampleEntry 7
[
  "HintSampleEntry",
  "VisualSampleEntry",
  "MetaDataSampleEntry",
  "HEVCSampleEntry",
  "AVCSampleEntry",
  "AVC2SampleEntry",
  "SampleEntry"
]