Refactor and advancements

- Drops mailController, centralized in UserController
- Adds views folder for change_password
- Improves PromiseRouter to support text results
- Improves PromiseRouter to support empty responses for redirects
- Adds options to AdaptableController
- UsersController gracefully fails when no adapter is set
- Refactors GlobalConfig into same style for Routers

spec/ParseGlobalConfig.spec.js

@@ -2,13 +2,12 @@
 
 var request = require('request');
 var Parse = require('parse/node').Parse;
-var DatabaseAdapter = require('../src/DatabaseAdapter');
-
-let database = DatabaseAdapter.getDatabaseConnection('test', 'test_');
+let Config = require('../src/Config');
 
 describe('a GlobalConfig', () => {
   beforeEach(function(done) {
-    database.rawCollection('_GlobalConfig')
+    let config = new Config('test');
+    config.database.rawCollection('_GlobalConfig')
       .then(coll => coll.updateOne({ '_id': 1}, { $set: { params: { companies: ['US', 'DK'] } } }, { upsert: true }))
       .then(done());
   });
@@ -61,7 +60,8 @@ describe('a GlobalConfig', () => {
   });  
 
   it('failed getting config when it is missing', (done) => {
-    database.rawCollection('_GlobalConfig')
+    let config = new Config('test');
+    config.database.rawCollection('_GlobalConfig')
       .then(coll => coll.deleteOne({ '_id': 1}, {}, {}))
       .then(_ => {
         request.get({