fix 4.1 bugs

Author: previ

camera.py

@@ -49,7 +49,6 @@ class Camera(object):
     # pylint: disable=too-many-public-methods
 
     _instance = None
-    _img_template = image.Image.load("static/media/coderdojo-logo.png")
 
     @classmethod
     def get_instance(cls):
@@ -252,18 +251,6 @@ def find_line(self):
         self.set_image_cv(img)
         return coords
 
-    def find_signal(self):
-        angle = None
-        ts = time.time()
-        img = self.get_image()
-        signals = img.find_template(self._img_template)
-
-        logging.info("signal: %s", str(time.time() - ts))
-        if signals:
-            angle = signals[0].angle
-
-        return angle
-
     def find_face(self):
         face_x = face_y = face_size = None
         img = self.get_image()

static/js/blockly/blocks.js

@@ -572,27 +572,6 @@ Blockly.Python['coderbot_adv_findLine'] = function(block) {
   return [code, Blockly.Python.ORDER_ATOMIC];
 };
 
-Blockly.Blocks['coderbot_adv_findSignal'] = {
-  /**
-   * Block for findSignal function.
-   * @this Blockly.Block
-   */
-  init: function() {
-    this.setHelpUrl(Blockly.Msg.LOGIC_BOOLEAN_HELPURL);
-    this.setColour(250);
-    this.appendDummyInput()
-        .appendField(Blockly.Msg.CODERBOT_SENSOR_FINDSIGNAL);
-    this.setOutput(true, 'Number');
-    this.setTooltip(Blockly.Msg.LOGIC_BOOLEAN_TOOLTIP);
-  }
-};
-
-Blockly.Python['coderbot_adv_findSignal'] = function(block) {
-  // Boolean values true and false.
-  var code = 'get_cam().find_signal()';
-  return [code, Blockly.Python.ORDER_ATOMIC];
-};
-
 Blockly.Blocks['coderbot_adv_findFace'] = {
   /**
    * Block for findSignal function.

templates/blocks_adv.xml

@@ -304,7 +304,6 @@
       <block type="coderbot_cam_average"></block>
       <block type="coderbot_adv_pathAhead"></block>
       <block type="coderbot_adv_findLine"></block>
-      <block type="coderbot_adv_findSignal"></block>
       <block type="coderbot_adv_findFace"></block>
       <block type="coderbot_adv_findColor">
         <value name="COLOR">

templates/blocks_std.xml

@@ -61,7 +61,6 @@
     <category name="{% trans %}Vision{% endtrans %}" colour="290">
       <block type="coderbot_adv_pathAhead"></block>
       <block type="coderbot_adv_findLine"></block>
-      <block type="coderbot_adv_findSignal"></block>
       <block type="coderbot_adv_findFace"></block>
       <block type="coderbot_adv_findColor">
         <value name="COLOR">