Quotes around URL passed to fetch_cmd

Cities with spaces/special characters would cause breakage
round up temperature
Add antigen compatable plugin description
Merge pull request #5 from michaelhood/master

Add support for spaces and special characters in location (Fixes #4, Closes #7, closes #13, closes #18, closes #19)
Merge pull request #10 from andreineculau/patch-1

round up temperature
Merge pull request #22 from matthewfranglen/master

Add antigen compatible plugin description for ZSH