Kredits are stored on the Token contract as uint256 / bignumbers with 18
decimal points. Just like Ether and required by the ERC20 standard.
So we need to work with bignumbers and format a bignumber value here.
The kredits module always returns raw data from the contract. For uint
values these are bignumbers.
To handle those in the ember app we need to convert them to string or to
number.