add plugin directory

src/app.js

@@ -328,10 +328,15 @@ Please make a backup of your contracts and start using http://remix.ethereum.org
     debug,
     analysis,
     test,
-    filePanel.remixdHandle,
-    ...appManager.registeredPlugins()
+    filePanel.remixdHandle
   ])
 
+  try {
+    appManager.register(await appManager.registeredPlugins())
+  } catch (e) {
+    console.log('couldn\'t register iframe plugins', e.message)
+  }
+
   await appManager.activate(['contentImport', 'theme', 'editor', 'fileManager', 'compilerMetadata', 'compilerArtefacts', 'network', 'offsetToLineColumnConverter'])
   await appManager.activate(['mainPanel'])
   await appManager.activate(['menuicons', 'home', 'sidePanel', 'pluginManager', 'fileExplorers', 'settings'])

src/remixAppManager.js

@@ -1,4 +1,4 @@
-/* global localStorage */
+/* global localStorage, fetch */
 import { PluginEngine, IframePlugin } from '@remixproject/engine'
 import { EventEmitter } from 'events'
 import { PermissionHandler } from './app/ui/persmission-handler'
@@ -20,6 +20,7 @@ export class RemixAppManager extends PluginEngine {
     super(plugins, settings)
     this.event = new EventEmitter()
     this.registered = {}
+    this.pluginsDirectory = 'https://github.com/ethereum/remix-plugins-directory'
   }
 
   onActivated (plugin) {
@@ -73,7 +74,7 @@ export class RemixAppManager extends PluginEngine {
     return requiredModules.includes(name)
   }
 
-  registeredPlugins () {
+  async registeredPlugins () {
     const vyper = {
       name: 'vyper',
       displayName: 'Vyper',
@@ -262,6 +263,7 @@ export class RemixAppManager extends PluginEngine {
       icon: 'https://zokrates.blockchain-it.hr/zokrates.svg',
       location: 'sidePanel'
     }
+    const plugins = JSON.parse(await fetch(this.pluginsDirectory))
     return [
       new IframePlugin(pipeline),
       new IframePlugin(vyper),
@@ -277,7 +279,8 @@ export class RemixAppManager extends PluginEngine {
       new IframePlugin(gasProfiler),
       new IframePlugin(flattener),
       new IframePlugin(ethpm),
-      new IframePlugin(zokrates)
+      new IframePlugin(zokrates),
+      ...plugins
     ]
   }
 }