README + compatibility matrix

Author: Jonathing

README.md

@@ -0,0 +1,21 @@
+# GradleUtils
+
+GradleUtils is a convention plugin for Minecraft Forge. It is a set of utilities commonly used by our projects which
+helps us standardize our buildscripts.
+
+## Compatibility
+
+<!-- TODO [GradleUtils][Compatibility] If possible, make a precise compatibility matrix. -->
+
+| GradleUtils    | Java | Gradle |
+|----------------|------|--------|
+| 2.0.x          | 8    | 7.2*   |
+| 2.1.0 - 2.3.0  | 8    | 8.4*   |
+| 2.3.1 - 2.3.3  | 11   | 8.4*   |
+| 2.3.4 - 2.3.6  | 11   | 8.5*   |
+| 2.4.0 - 2.4.9  | 17   | 8.6    |
+| 2.4.10 - 2.5.x | 17   | 8.1*   |
+| 2.6.x          | 17   | 7.3    |
+
+\*Compatibility was not tested for this version, but this is the lowest recommended version as it was built
+against it.