Pushing version to 0.8.4
Pushing version to 0.8.4

Angular has been changed to RC4.
Typings has been changed to 1.3.1.
ankitw77/angular2-grid,ankitw77/angular2-grid,BTMorton/angular2-grid,BTMorton/angular2-grid,ankitw77/angular2-grid,BTMorton/angular2-grid