Added a basic reward model and repetitive unlocks to calculate time till next unlock on repeating rewards

src/main/java/dev/astridlabs/playtimerewardsplus/Controllers/GASM.java

@@ -0,0 +1,10 @@
+// GASM.java  (General Activation Sequence Manager)
+//   - In charge of making sure things do their thing when they are supposed to
+//
+// (c) Owen Rummage 2020
+
+package dev.astridlabs.playtimerewardsplus.Controllers;
+
+public class GASM {
+
+}