additions (from f-droid) and some link updates

entries/freebloks_3d_for_android.md

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+# Freebloks 3D for Android
+
+- Home: http://www.saschahlusiak.de/freebloks-3d-android/
+- Inspiration: Tetris
+- State: mature
+- Download: https://f-droid.org/en/packages/de.saschahlusiak.freebloks/
+- Platform: Android
+- Keyword: strategy
+- Code repository: https://github.com/shlusiak/Freebloks-Android.git
+- Code language: Kotlin, C++
+- Code license: GPL-2.0
+
+## Building
+
+- Build system: Gradle