Wrap Handlebars in a template adapter, Part II

[spikebrehm]

This is an evolution of #19. Unfortunately had to open a new PR because I couldn't push commits to @hurrymaplelad's branch (or my Git-fu isn't that strong).

I think this is all ready to go. It uses airbnb/rendr-handlebars (forked from @hurrymaplelad). I've simplified its API so that instead of:

this.app.templateFinder.getTemplate(templateName);
this.app.layoutFinder.getTemplate(layoutName);

we have:

this.app.templateAdapter.getTemplate(templateName);
this.app.templateAdapter.getLayout(layoutName);

Before we merge into airbnb/rendr, we need to figure out how to properly package the client-side files for an app, which I'm proof-of-concepting with airbnb/rendr-app-template (view the template-adapter branch). It works fine server-side, however because we're using Stitch to package for the client, we'll have to do something like use Grunt+Browserify to compile a client-side dist file, because Stitch doesn't automatically package up the module graph. This is another reason to switch to Browserify from Stitch, but that may be a lot more work.

[hurrymaplelad]

I think we can move forward without solving packaging. Seems like another big open question. Would be nice to keep both discussions moving.

@spikebrehm, you okay with requiring a few extra lines in project build files while #35 gets sorted out, or would you rather wait and release a polished build interface?

[spikebrehm]

@hurrymaplelad so sorry for waiting FOREVER to get this merged in! I was finally able to give it a test locally, and it works beautifully. Will merge now.

[spikebrehm]

I just first want to make sure that it's still easy to add custom Handlebars helpers in rendr-app-template.

[jeffyip]

👍