Fix error on older Unity version due to missing multi_compile support… … in compute shader

Use SimpleITK for image sequence datasets (#226) * Use SimpleITK's image sequence importer when available * SimpleITKDicomImporter * Use image file importer for tiff

docs 

Handle linear colour space + Unity EULA compatilble third party licen… …se notice (#155) * Unity EULA-compatible third party notices * Handle linear colour space * Perform gamma correction in TF palette shader, since Graphics.DrawTexture doesn't.

Update ImportSettingsEditorWindow.cs 

SimpleITK: DICOM JPEG, NRRD, NIFTI (Windows only) (#95) * SimpleITK-based DICOM importer. * Cleanup: Importer interfaces and factory. * NRRD and NIFTI import (using SimpleITK) * Added script for exporting .unitypackage * Updated documentation. * Don't use EditorDatasetImporter for RAW import. * .gitattributes