Improve some capacitors; Add 3V3 indicator LED

Chose some more sensible caps for the higher-value decoupling ones to
actually reach the capacitance requested in the data sheet.

Signed-off-by: Matthias Blankertz <matthias@blankertz.org>

mini-stm-board.kicad_dru

@@ -71,7 +71,7 @@
 # This rule handles diameter minimum and maximum for ALL holes.
 # Other specialized rules handle restrictions (e.g. Via, PTH, NPTH) 
 (rule "Hole diameter"
-	(constraint hole_size (min 0.2mm) (max 6.3mm))
+	(constraint hole_size (min 0.3mm) (max 6.3mm))
 )
 
 (rule "Hole (NPTH) diameter"

mini-stm-board.kicad_prl

@@ -1,6 +1,6 @@
 {
   "board": {
-    "active_layer": 5,
+    "active_layer": 0,
     "active_layer_preset": "",
     "auto_track_width": true,
     "hidden_netclasses": [],

mini-stm-board.kicad_pro

@@ -450,7 +450,7 @@
       "no_connect_dangling": "warning",
       "pin_not_connected": "error",
       "pin_not_driven": "error",
-      "pin_to_pin": "warning",
+      "pin_to_pin": "error",
       "power_pin_not_driven": "error",
       "same_local_global_label": "warning",
       "similar_label_and_power": "warning",