fix tests
update mixpanel js to 2.1
missed script tag
remove duplicated line
Require rb-fsevent gem version >= v0.9.2

This resolves the following build error. Apparently rb-fsevent 0.4.0 is obsolete.
  Installing rb-fsevent (0.4.0) with native extensions
  Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
  …
  extconf.rb:48:in `<main>': Compilation of fsevent_watch failed (see README) (RuntimeError)
Modify KissMetrics #identify to fall back to ID parameter when :email parameter is not present
Only add setDomainName if the :domain key is set, just like allowLinker. Seems weird to _setDomainName '' if you're tracking a single site
Allow google user to use _setSiteSpeedSampleRate
Merge pull request #52 from yachi/fix_tests

fix tests
Merge pull request #53 from yachi/update_mixpanel_2.1

update mixpanel js to 2.1
Merge pull request #54 from oshoma/kissmetrics_id_fallback

Kissmetrics id fallback
Merge pull request #55 from kamilski81/master

Allow user to use Google's _setSiteSpeedSampleRate functionality
Update README.rdoc
Merge pull request #50 from freerobby/hardcoded_format

Hard-code the HTML format for the analytical_javascript partial.