1.3.0:
# added tracking for Google AdSense
# memo for myself: correct version number scheme: major release number -> plugin rewrite, minor release number -> new feature, patch level -> bug fix

1.2.4:
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# added _anonymizeIp()

1.2.3:
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# Bug with external link and downloads fixed

1.2.2:
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# added ChangeLog
# added check if account number is valid
# updated to new GA asynchronous tracking code