Update documentation with the new tell operators/functions

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See the linked issues

Original issue reported on code.google.com by krustev....@gmail.com on 12 Apr 2014 at 1:03

• Blocked on: #128, #168, #169, #170, #171, #173, #174, #175

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Original comment by krustev....@gmail.com on 21 Apr 2014 at 1:11

• Now blocked on: #173, #174, #175

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Original comment by krustev....@gmail.com on 5 May 2014 at 4:00

• Now blocked on: #128