docs(guide/Introduction): CRUD & Punctuation

[samilamti]

Added description of what CRUD means. Improved readability: Ensured that colons were followed by a capital letter, some sprinkled commas.

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[samilamti]

Thanks :) I've signed!

2015-01-19 14:06 GMT+01:00 googlebot notifications@github.com:

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[googlebot]

CLAs look good, thanks!