Prior to this change `ngc` would place generated files which refer
to components in the node_modules into the node_module. This is an
issue. Now all of the files are forced into a single directory
as specified in `tsconfig.json` by the `genDir` option.
see: https://docs.google.com/document/d/1OgP1RIpZ-lWUc4113J3w13HTDcW-1-0o7TuGz0tGx0g
RelectorHost threw an exception when metadata was requested for a
.d.ts file that didn't have a .metadata.json file. Changed it to
return undefined.
Fixes#9678
Refactored ReflectorHost to allow it to be tested.
Fixed an issue where the .d.ts was findable but it wasn't used by the project
(This happens when the .metadata.json file references a module that was not
needed, such as it doesn't declare any types, and the reference to it was
elided by TypeScript when writing the .d.ts file).
Added tests for ReflectorHost
Miško Hevery
Chuck Jazdzewski
Victor Berchet
ScottSWu
vsavkin
Alex Eagle