[maven-release-plugin] copy for tag jgltf-parent-2.0.4

[maven-release-plugin] copy for tag jgltf-parent-2.0.3

[maven-release-plugin] copy for tag jgltf-parent-2.0.2

[maven-release-plugin] copy for tag jgltf-parent-2.0.1

[maven-release-plugin] copy for tag jgltf-parent-2.0.0

Updated sample models configuration

Updated test models paths

Updated version number

Updated viewer readmes

Updated readme