Move location code to upstream loadVersion()

src/app.js

@@ -516,7 +516,13 @@ var run = function () {
     queryParams.update({ version: version });
     var url;
     if (version === 'builtin') {
-      url = 'soljson.js';
+      var location = window.document.location;
+      location = location.protocol + '//' + location.host + '/' + location.pathname;
+      if (!location.endsWith('/')) {
+        location += '/';
+      }
+
+      url = location + 'soljson.js';
     } else {
       url = 'https://ethereum.github.io/solc-bin/bin/' + version;
     }

src/app/compiler.js

@@ -201,13 +201,6 @@ function Compiler (editor, handleGithubCall) {
       jobs.push({sources: source});
       worker.postMessage({cmd: 'compile', job: jobs.length - 1, source: JSON.stringify(source), optimize: optimize});
     };
-    if (!url.startsWith('http') && !url.startsWith('file')) {
-      var loc = window.document.location;
-      var locStr = loc.protocol + '//' + loc.host + '/' + loc.pathname;
-      if (!locStr.endsWith('/'))
-        locStr += '/';
-      url = locStr + url;
-    }
     worker.postMessage({cmd: 'loadVersion', data: url});
   }