fast forward to support the new analytics.js. custom variables are discontinued and will revive as custom dimensions and metrics
setting custom tracker options. cookieDomain as the first
update gemspec
run tests also on analytics branch
include travis badge in readme [ci skip]
allow tracking of events only
add pry-debugger to the Gemfile and test helper for comfortable debugging
fix tests
described events_only in the README and CHANGELOG
Merge pull request #29 from kangguru/events_only

Allow tracking of events only
migrating #35, #36, #37 and #34
preparing pre release 1.0.0.pre1
Merge branch 'master' into analytics-js

Conflicts:
	CHANGELOG.md
	README.md
	lib/rack/google-analytics.rb
	lib/rack/google-analytics/version.rb
	lib/rack/templates/async.erb
	lib/rack/templates/sync.erb
	test/test_rack-google-analytics.rb
rolling 1.0.0 release