(Feature) add source code of Proxy smart-contract to Publish page

[fernandomg]

Closes #1037

I've just added sources for .abi, .bin and .src.

[dennis00010011b]

@fernandomg
Publish page: section CROWDSALE PROXY CONTRACT CREATION CODE contains contract byte code (it matches ./public/contracts/MintedCappedProxy.bin in case of Minted crowdsale)

Should contains contract creation code = contract byte code + constructor parameters

[coveralls]

Pull Request Test Coverage Report for Build 2980

• 0 of 1 (0.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.02%) to 20.332%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/components/stepFour/index.js	0	1	0.0%

Totals
Change from base Build 2976:	-0.02%
Covered Lines:	834
Relevant Lines:	3595

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💛 - Coveralls

[fernandomg]

@dennis00010011b Mh... It was intended to be the 'Contract Creation Code' for the proxy contract. And so far it looks that it's not necessary on the TW.

Also to find the 'Contract Creation Code' for an already deployed contract, I have to find the original tx when the Proxy contract was deployed, and gather the information from there (@dennis00010011b, @vbaranov please correct me if I'm wrong).

So I just leave only the .abi and .src content in the Publish page.

[vbaranov]

@fernandomg we need to give source code and ABI encoded parameters to a user. By having these set of parameters (with contract name and compiler version) a user will be able to verify Proxy smart-contract and will see ABI of it after verification. Addition of ABI encoded parameters is requested in #1038. Addition of source code is implemented here. Display of ABI is redundant. Let's remove it from Publish page.

[fernandomg]

@vbaranov thanks for the clarification, change done.