Test 2.0.0 and 2.1.0 via Travis
Cleanup Gemfile
Bump Nokogiri and VCR
Remove AdMeld (purchased by Google)
Add pry as development/test dependency
Strip Guardfile cruft
Update spec_helper
Update AdSense sniffer

NOTE: Google advertising should probably be handled collectively.
Update Google Analytics sniffer
Clean Wordpress sniffer
Clean vBulletin sniffer
Add User-Agent to test request
Remove GumGum sniffer (in-line ads via JS)
Clean MixPanel sniffer
Clean Quantcast sniffer
Fix jQuery sniffer spec (this needs work)
Stop testing < 1.9.3
Clean README and rep my set
Clean primary Sniffles class
Clean Kontera sniffer