Eternal storage redundant functions

[maxsam4]

There are a few redundant functions in the eternal storage contract
like

function getBool(bytes32 _key) internal view returns (bool) {
        return boolStorage[_key];
}

and

function getBoolValues(bytes32 _variable) public view returns(bool) {
        return boolStorage[_variable];
}

The internal functions can be removed and code can be refactored to use the public function instead.

[dev1644]

I am working on it.

[maxsam4]

Closed by #488
Thank you @dev1644 for your contribution