Docs: rename the documentation files to all-caps

I wasn't able to decide on any proper casing for CHANGELOG.md, thus
think it's better to rename everything else to fit it.

Author: ForNeVeR

License.md LICENSE.mdLicense.md renamed to LICENSE.md

@@ -10,10 +10,11 @@ EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{A11DCC5B-EC24-4A69-B6BB-FA2F0043D0F3}"
 ProjectSection(SolutionItems) = preProject
 	package.json = package.json
-	Readme.md = Readme.md
 	Dockerfile = Dockerfile
 	.dockerignore = .dockerignore
 	NuGet.Config = NuGet.Config
+	LICENSE.md = LICENSE.md
+	README.md = README.md
 EndProjectSection
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = ".github", ".github", "{339BA2DC-3628-4E8E-98CC-264B5A3625AA}"