Adds liniting into the workflow (#3082)

* initial linting of src

* fix indent to 2 spaces

* Removes unnecessary rules

* ignore spec folder for now

* Spec linting

* Fix spec indent

* nits

* nits

* no no-empty rule

src/Adapters/Files/FilesAdapter.js

@@ -1,3 +1,4 @@
+/*eslint no-unused-vars: "off"*/
 // Files Adapter
 //
 // Allows you to change the file storage mechanism.

src/Adapters/Files/GridStoreAdapter.js

@@ -28,7 +28,7 @@ export class GridStoreAdapter extends FilesAdapter {
 
   // For a given config object, filename, and data, store a file
   // Returns a promise
-  createFile(filename: string, data, contentType) {
+  createFile(filename: string, data) {
     return this._connect().then(database => {
       let gridStore = new GridStore(database, filename, 'w');
       return gridStore.open();