refactor(components): convert components to separate modules

src/components/checkbox/checkbox.module.ts

@@ -0,0 +1,19 @@
+import { NgModule, ModuleWithProviders } from '@angular/core';
+
+import { Checkbox } from './checkbox';
+
+@NgModule({
+  declarations: [
+    Checkbox
+  ],
+  exports: [
+    Checkbox
+  ]
+})
+export class CheckboxModule {
+  public static forRoot(): ModuleWithProviders {
+    return {
+      ngModule: CheckboxModule, providers: []
+    };
+  }
+}