fix(compiler): make sourcemaps work in AOT mode

Inlcuded fixes:
- include preamble in generated source map
- always add a mapping for line/col 0 so that the
  generated sourcemap is not sparse
- use a uniue sourceUrl for inline templates even
  in the AOT case

scripts/ci/offline_compiler_test.sh

@@ -17,6 +17,7 @@ PKGS=(
   @types/{node@6.0.38,jasmine@2.2.33}
   jasmine@2.4.1
   webpack@2.1.0-beta.21
+  source-map-loader@0.2.0
   @angular2-material/{core,button}@2.0.0-alpha.8-1
 )