Also update dart_to_js_script_rewriter dependency to ^1.0.1,
and change most angular2.dart imports to be core.dart instead.
The pipes example broke without the angular2.dart import, so I let it be.
The server-communication sample has never worked for me,
so I changed it but might have broken it further.
closes#1007
Filipe Silva
Kathy Walrath
Vladislav Zarakovsky
Tom Ingebretsen