Modify HTML5 manifest file to allow offline usage

[Glavin001]

See https://developer.mozilla.org/en-US/docs/Web/HTML/Using_the_application_cache

Given that we have no server and are using LocalStorage and File API ( #13 ) for loading and saving files, there are no requirements to be online. As long as we specify an HTML5 Manifest file, our web application will work seamlessly even without an Internet connection!

[MatKallada]

Our application is designed to make zero external network communication and is inherently online; what exactly is the idea of this feature request?

[Glavin001]

Our application is designed to make zero external network communication

Exactly!

is inherently online

Not necessarily. If we include a proper HTML5 manifest then our web application will run in web browsers offline, as all of the required resources (as specified by the manifest) are cached by the browser and used when the browser is used offline.

[MatKallada]

@Glavin001 Thanks, for clarifying; I've updated the feature request slightly to make it more clear.

@Kallada: Our application is designed to make zero external network communication

On a side note, as mentioned in #2, we actually are making external network requests to Google Analytics - though, this shouldn't be a worry.

[Glavin001]

No problem :). Thanks.

Good point with the Google Analytics. Also Cloud Storage support (#19), if we do end up implementing that feature.