move most compiler code to remix-solidity

src/app/compiler/compiler-imports.js

 'use strict'
+// TODO: can just use request or fetch instead
 var $ = require('jquery')
 var base64 = require('js-base64').Base64
 var swarmgw = require('swarmgw')
@@ -60,6 +61,7 @@ module.exports = {
       if (match) {
         found = true
 
+        // TODO: this needs to be moved to the caller
         $('#output').append($('<div/>').append($('<pre/>').text('Loading ' + url + ' ...')))
         handler.handler(match, function (err, content, cleanUrl) {
           if (err) {

src/app/compiler/compiler-worker.js

-'use strict'
-
-var solc = require('solc/wrapper')
-
-var compileJSON = function () { return '' }
-var missingInputs = []
-
-module.exports = function (self) {
-  self.addEventListener('message', function (e) {
-    var data = e.data
-    switch (data.cmd) {
-      case 'loadVersion':
-        delete self.Module
-        // NOTE: workaround some browsers?
-        self.Module = undefined
-
-        compileJSON = null
-
-        self.importScripts(data.data)
-
-        var compiler = solc(self.Module)
-
-        compileJSON = function (input) {
-          try {
-            return compiler.compileStandardWrapper(input, function (path) {
-              missingInputs.push(path)
-              return { 'error': 'Deferred import' }
-            })
-          } catch (exception) {
-            return JSON.stringify({ error: 'Uncaught JavaScript exception:\n' + exception })
-          }
-        }
-
-        self.postMessage({
-          cmd: 'versionLoaded',
-          data: compiler.version()
-        })
-        break
-      case 'compile':
-        missingInputs.length = 0
-        self.postMessage({cmd: 'compiled', job: data.job, data: compileJSON(data.input), missingInputs: missingInputs})
-        break
-    }
-  }, false)
-}