Edit questions in kb.md to meet QnA data guidelines

The questions in [kb.md](https://github.com/buildOMG/kb/blob/master/kb.md) are too long. They need to be edited to follow the [QnA data guidelines](https://github.com/buildOMG/kb/blob/master/qna/qna_data.md) below, as suggested by @SAAnderson

# QnA data guidelines

Starter for some guidelines around building good QnA training data for a bot service.

## Questions

* To help the models the questions in the training data need to succinct:
* Not this: "How safe will staking be? Will the “average Joe” be able to stake without having to worry about his/hers OMGs? Will there be certain precautions that will need to be taken in order to prevent being hacked?"
* ...but this: "How safe will staking be?"
* ...or this: "Will staking be safe?"
* We probably need to be careful about having overlapping Q&As in different places
* `TODO: Can we prioritise one answer over another with metadata?`
* If the questions are short we can probably automate generating phrasing variations to help the models
* You can plug [Active learning](https://www.qnamaker.ai/old/Documentation/ActiveLearning) into the Azure bot service now too

## Answers

* Should be triaged to make sure they are acceptable (clear, correct, free from the usual troll stuff if they are from the community)
* `TODO: how to sign these off? Pull request?`
* The QnA bot should provide the **pointer** to the correct response, not the answer. `IMO: PickledN`