Simplified error handling

Ignore connection errors and return empty data
By default superagent does not treat 40x/50x responses as errors.
We use custom pipe method to prevent parsing such responses.
Prefetch the resort data

Ask periodically approx. once a minut for a fresh status to keep status
cache fresh.
Tags calculator
Handle tag routes

/tag/<tag> route added

It will only display resorts that have <tag> assigned
Display tag links on the page
Add 'Lake Tahoe' and 'California' tags
Killington added

http://www.killington.com/winter/mountain/conditions/lifts
Add 'New England' tag
Loon Mountain added
Mammoth Lakes resort

http://www.mammothmountain.com
Merge branch 'prefetch' into new-release
Merge branch 'tags' into new-release
Merge branch 'killington' into new-release
Merge branch 'loon' into new-release
Merge branch 'mammoth-lakes' into new-release
Release 0.0.9