Features
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* New `CheckReport` object to have a detailed report of a DCP check, this replace the `dict` returned before. This include an exhaustive list of all check performed as well as the new human friendly report that is dumped on the log
* Add OpenCaption, ClosedCaption coherence check between the ContentTitle and the actual content of the CompositionPlaylist
Changes
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* Add the `Metadata` boolean key to CompositionPlaylist probe to quickly determine if it contains a CompositionMetadataAsset
* Add `OpenCaption`, `ClosedCaption` and `OpenCaptionLanguage` keys to CompositionPlaylist probe
* Subtitle check module now performs all checks on both Subtitle and ClosedCaption tracks
Fix
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* Fix error on ContentTitle date validation, see 170
* Fix error on subtitle font glyph check when text consist solely of numbers