Adding Kleros Escrow ETH Version with Fee Recipient

[remedcu]

Task List:

• Smart Contract
• Javascript Test

[remedcu]

Change History from original file MultipleArbitrableTransaction includes:

• RAB Pragma Updated
• Contract Name Changed
• Variable to store fee recipient and % created
• Events related to fee payment and fee recipient change created
• Constructor updated to initialize fee recipient and %
• Functions created: calculateFeeRecipientAmount(), changeFeeRecipient()
• Functions updated: pay(), executeTransaction(), executeRuling()

[unknownunknown1]

Approved