Fix halfway-fab import (#343)

Author: jfcere

lib/src/card/index.ts

@@ -1,3 +1,3 @@
-export * from './halfway-fab';
+export * from './halfway-fab/index';
 export * from './card.component';
 export * from './card.module';

lib/src/materialize.module.ts

@@ -1,7 +1,6 @@
 import { CommonModule } from '@angular/common';
 import { ModuleWithProviders, NgModule } from '@angular/core';
 import { FormsModule } from '@angular/forms';
-import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
 
 import { MzBadgeModule } from './badge/badge.module';
 import { MzButtonModule } from './button/button.module';