Load scheme information from configuration files

[AugustoL]

Right now the schemes are deployed and loaded based on hardcoded configuration and parameters form the scripts, it would be good to have a .json file with all the information needed for deployment in a single file.
The file can also be used to load schemes configurations in the dapp.

Each configuration is hashed and stored/indexed by hash in the voting machine.

So the scheme configurations file will have an array of configurations that will be read from a .json file, and we used them based on their hash.