Make window position, frame, and grid count configurable

example.config.toml

@@ -1,6 +1,19 @@
+[window]
+# Window dimensions
+#width = 1920
+#height = 1080
+
+# Position a frameless window (useful for capturing w/ fixed screen positions)
+#x = 0
+#y = 0
+#frameless = false
+
 # Set the background color (useful for chroma-keying)
 #background-color = "#0f0"
 
+[grid]
+#count = 3
+
 [control]
 # Address to serve control server from
 address = "http://localhost:80"