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Updated Community Contribution literacy

changed intro text, added a Make item
JUST TESTING
Revert just testing
copy edits to open practices
added language strings
Bug 1021077 - Fix 'Jump to' showing undefined in firefox
Fix: bug introduced to public/data/content.json
Merge pull request #792 from k88hudson/1021077

Requesting a pull to mozilla:master from k88hudson:1021077