Add some comments to top of builder .js files

js/build_utils.js

@@ -1,3 +1,7 @@
+/**
+ * File containing utility functions that are useful for the builder page.
+ */
+
 /*Turns the input amount of skill points into a float precision percentage.
 * @param skp - the integer skillpoint count to be converted
 */

js/builder.js

@@ -1,3 +1,6 @@
+/**
+ * File containing utility functions relevant to the builder page, as well as the setup code (at the very bottom).
+ */
 
 function populateBuildList() {
     const buildList = document.getElementById("build-choice");

js/builder_graph.js

@@ -1,3 +1,7 @@
+/**
+ * File containing compute graph structure of the builder page.
+ */
+
 let armor_powder_node = new (class extends ComputeNode {
     constructor() { super('builder-armor-powder-input'); }
 

js/display.js

@@ -1,3 +1,8 @@
+/**
+ * File containing generic display code, ex. for displaying items and spell damage.
+ * TODO: split this file into separate parts for each "component".
+ */
+
 const itemBGPositions = {"bow": "0 0", "spear": "9.090909090909088% 0", "wand": "18.181818181818183% 0", "dagger": "27.27272727272727% 0", "relik": "36.36363636363637% 0",
     "helmet": "45.45454545454546% 0", "chestplate": "54.54545454545454% 0", "leggings": "63.63636363636363% 0", "boots": "72.72727272727272% 0",
     "ring": "81.81818181818181% 0", "bracelet": "90.90909090909092% 0", "necklace": "100% 0",