feat(Store): Added injection token option for feature modules

[brandonroberts]

• Fixes AOT issues when providing reducers via an InjectionToken
• Adds a build step before starting the example app
• Adds the example-app to CI testing

Closes #116, #141, #147

[victornoel]

@brandonroberts I tried to use this branch to validate it did fix #147 with my code (I build it and replaced the folders in my node_modules/@ngrx with those from dist), and when I run my application with --prod, I get the following error:

ERROR in /home/victor/code/petals-cockpit/frontend/src/$$_gendir/node_modules/@ngrx/store/store.ngfactory.ts (51,65): Argument of type '{}' is not assignable to parameter of type 'StoreFeature<any, any>[]'.
  Property 'includes' is missing in type '{}'.

I suspect there is something wrong with this PR or is it me doing something wrong?

[victornoel]

using typescript 2.4, maybe that's why, I noticed you have both typescript 2.4 and 2.3 in your node_modules (2.4 at the root, 2.3 under angular-cli), and angular-cli will use 2.3 so the example app is most certainly built and executed with 2.3.

[victornoel]

I tried to execute the example-app with ts 2.4 and it works, so I suppose it is just that now #147 breaks at build time instead of runtime... (and thus this PR does not solve #147 :)

[victornoel]

even though it is strange because I don't use features at all in my application (see #147 (comment))

[bfricka]

I have to admit, I tried implementing this the other day, and couldn't figure it out. Nice work.