v0.0.4
Implemented the following behavior when encountering missing APOD images:
- when asking for specified date which has no APOD data available? -> 404
- when asking for interval of APOD images, some of them not available? -> return json array only with data for available dates
- when asking for random APOD day? -> return one of existing APOD dates. This request should never fail.
In response the this issue: #40