Refactorization to manage multiple contracts#4

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tillkolter wants to merge 6 commits intookwme:masterfrom

tillkolter:master

Commits on Dec 4, 2017

Refactor dapp scratch to manage multiple contracts
tillkolter
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Commits on Dec 5, 2017

Commits on Dec 6, 2017

Commits on Dec 7, 2017

Add identity observer pattern
tillkolter
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