Prevent querying isitsnowingyet.org if location is unknown or incomplete.
Commented my changes to the Snow Spice.
Xkcd: added next button that appears when there is a next comic
Xkcd: made next button float right
Xkcd: renamed, added if in template, added css
Xkcd: fix naming of share files
Merge pull request #408 from bradcater/prevent-emtpy-snow-location-query

Prevent querying isitsnowingyet.org if location is unknown or incomplete.
Xkcd: commented
Merge pull request #409 from mattr555/xkcd-next-button

Xkcd: added next button