Fixing up comments
Merge pull request #4793 from danmcp/master

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Bug 1066945 - Fixing urls
Update Contributor's Guide with more detail.
Merge pull request #4794 from danmcp/master

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Merge pull request #4796 from nhr/contributors_guide_improvements

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Bug 1066850 - Fixing urls
Merge pull request #4800 from danmcp/master

Merged by openshift-bot