Merge pull request #1 from html5rocks/master

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add trailing slash to URLs for consistent analytics tracking.
URLs should end in a trailing /, fixes issue with query string
Fixes issue 416
fixes issue 429
Revert "fixes issue 429"

This reverts commit 3d90444af95eed7d976d34ac2f4b0f6c06baad95.
Merge pull request #517 from petele/master

Fixes #507 & #416, ensures that /tutorials|features|mobile|gaming|business have trailing / added