Make all URL's hyphenated

[ankit-agrawal11]

Originally reported by: Omkar Joshi (Bitbucket: omkarjoshi-cc, GitHub: omkarjoshi-cc)

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• Change all URL's to kebab case i.e make them hyphenated
• This will require a change in all XHR's and all components where <Link /> is used.

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• Bitbucket: https://bitbucket.org/causecode/react-hero/issue/19