Using "fs" to get ROSCA.sol prevents import on client side

[shine2lay]

when the packaged is required in the client side, it either gives can't find 'fs' module.
using webpack won't properly compile either.

[shine2lay]

@blorange

[blorange]

'fs' will not work on client side, so this module cannot run on a client side project. We should try to find some other way of importing the file if possible. Shop around and look for other Ethereum projects which have modules like this and see how they do it (if at all)