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Fixed links rendering as <code>
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A <ul> looks nicer.
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I am a markdown noob
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Final clean-up bits
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Re issue comment:
https://github.com/modxcms/revolution/pull/591#issuecomment-23623978
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Merge remote-tracking branch 'origin/pr/591' into readme

* origin/pr/591:
  Edited README.md
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  Create README.md