Docs: Add usage examples and API docs in readme (#62)
Docs: Add usage examples and API docs in readme (#62)

* add usage example for angular 2.0+

* add usage example for ngModel
add notes about angular cli

* add API docs

GNURub/ngx-datepicker,xavics/ng2-datepicker,schmop/ng2-datepicker,jkuri/ng2-datepicker,ozturki/ng2-datepicker,schmop/ng2-datepicker,GNURub/ngx-datepicker,xavics/ng2-datepicker,schmop/ng2-datepicker,xavics/ng2-datepicker,em-gei/ng2-datepicker,ozturki/ng2-datepicker,GNURub/ngx-datepicker,jkuri/ng2-datepicker,em-gei/ng2-datepicker,jkuri/ng2-datepicker,ozturki/ng2-datepicker,em-gei/ng2-datepicker