Added JSystemInfoKit submodule

.gitmodules

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+[submodule "JSystemInfoKit"]
+	path = JSystemInfoKit
+	url = https://github.com/jBot-42/JSystemInfoKit.git

JSystemInfoKit

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+Subproject commit 0e0ede0c5454708f5381f2bb954c266be1a4437e

README.md

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+# CaseLights
+
+## Working with Git Submodules
+
+To clone this repository, enter the following:
+
+    git clone https://xythobuz.de/git/CaseLights.git
+    git submodule init
+    git submodule update
+
+When pulling changes from this repository, you may need to update the submodule:
+
+    git submodule update
+
+## Licensing
+
+The included [JSystemInfoKit](https://github.com/jBot-42/JSystemInfoKit) project is licensed under the GPLv2.