Splits Adapter loading from AdaptableController

- Adds dynamic prototype conformance check upon setting adapter
- Throws when adapter is undefined, invalid in controller

src/Adapters/AdapterLoader.js

@@ -0,0 +1,39 @@
+
+export class AdapterLoader {
+  static load(options, defaultAdapter) {
+    let adapter;
+
+    // We have options and options have adapter key
+    if (options) {
+      // Pass an adapter as a module name, a function or an instance
+      if (typeof options == "string" || typeof options == "function" || options.constructor != Object) {
+        adapter = options;
+      }
+      if (options.adapter) {
+        adapter = options.adapter;
+      }
+    }
+    
+    if (!adapter) {
+      adapter = defaultAdapter;
+    }
+
+    // This is a string, require the module
+    if (typeof adapter === "string") {
+      adapter = require(adapter);
+      // If it's define as a module, get the default
+      if (adapter.default) {
+        adapter = adapter.default;
+      }
+    }
+    // From there it's either a function or an object
+    // if it's an function, instanciate and pass the options 
+    if (typeof adapter === "function") {
+      var Adapter = adapter;
+      adapter = new Adapter(options);
+    }
+    return adapter;
+  }
+}
+
+export default AdapterLoader;