Refactor mergeOptions to be on the Marionette object.

Resolves #107
Move Gistbook view to shared directory.
Remove unnecessary entities; reorganize remaining.

Resolves #113
Refactor Gistbook output view.

Managers have been renamed to Services. Services have been placed in the output-view
directory. The views in the separate output directory were moved into the output-view
directory.

Resolves #209
Show the loading indicator instantly when compiling a Gistbook.

Resolves #309
Refactor to use ES6 property method assignment syntax.
Refactor to use ES6 fat arrow + lexical this.

Resolves #247
Add new events to the Router.
Generalize StateRouter auth; remove Radio dependency.

Resolves #271
v0.1.16