Add on chain reputation score for Fortune

[portuu3]

It should affect only to Fortune
Create a contract for storing addresses and their reputations on chain.

The reputation score is a value from 0 to 100 (for ease of increase/decrease)

In case of “correct” work(from the rep oracle perspective):

1. The reputation score of the worker should be increased. (If the value is not already the maximum value)
2. The worker is rewarded with the appropriate amount of tokens based on its reputation.

In case of "incorrect" work:

1. The reputation score of the worker should be decreased. (If the value is not already the minimum value)
2. The worker shouldn't receive reward for this work.

The formula for the payout is:
x=[worker_rep_score]*[total_reward]/sum(all_wokers_rep_score)

Issue linked to #131

[portuu3]

duplicated #155