Update the readme (1/2)

README.md

@@ -11,4 +11,10 @@ The tool will be written in Go exploring the following:
 * Usage of channels
 * Localities
 * Interfaces
-* Generics (if possible)
+* Generics (if possible)
+
+## Phases
+### Step 1
+* Make the game in a functioning state (#11)
+### Step 2
+* Split the game in separate modules (#1)