Sync to update fork

Favouring the more descriptive form.

This is a port of drewnoakes/metadata-extractor-dotnet#298

This fixes an issue where XMP data was not being extracted from some DJI images, and allows presentation of data such as:

```
[XMPMeta - http://www.dji.com/drone-dji/1.0/] drone-dji:AbsoluteAltitude = -30.037239
[XMPMeta - http://www.dji.com/drone-dji/1.0/] drone-dji:RelativeAltitude = 19.700001
[XMPMeta - http://www.dji.com/drone-dji/1.0/] drone-dji:GimbalRollDegree = 0.000000
[XMPMeta - http://www.dji.com/drone-dji/1.0/] drone-dji:GimbalYawDegree = 69.400002
[XMPMeta - http://www.dji.com/drone-dji/1.0/] drone-dji:GimbalPitchDegree = -60.000000
[XMPMeta - http://www.dji.com/drone-dji/1.0/] drone-dji:FlightRollDegree = -2.100000
[XMPMeta - http://www.dji.com/drone-dji/1.0/] drone-dji:FlightYawDegree = 69.699997
[XMPMeta - http://www.dji.com/drone-dji/1.0/] drone-dji:FlightPitchDegree = -0.500000
[XMPMeta - http://www.dji.com/drone-dji/1.0/] drone-dji:CamReverse = 0
[XMPMeta - http://www.dji.com/drone-dji/1.0/] drone-dji:GimbalReverse = 0
[XMPMeta - http://www.dji.com/drone-dji/1.0/] drone-dji:RtkFlag = 0
```

Fixes #512

…quirement

Replace FilterInputStream with InputStream in FileTypeDetector

Allow Application Notes (XMP) in SubIFD

Double64 should take 8 bytes, instead of 4. I found this bug when I tried to read tags from a geotiff.

Fix reading arrays of Float64 in TIFF files

Adding support for Reconyx HyperFire 2 cameras.

Adding new director and directory files for Reconyx HyperFire2 cameras.

Reconyx HyperFire 2 Support

Output to more closely match the .NET library.