Make visibility explicitly declared on functions

[ryu9827]

Examples below, no visibility found:

BitHeroToken/contracts/AllocatedCrowdsaleMixin.sol

Line 37 in 60e3c92

function isBreakingCap(uint weiAmount, uint tokenAmount, uint weiRaisedTotal, uint tokensSoldTotal) constant returns (bool limitBroken) {

BitHeroToken/contracts/Crowdsale.sol

Line 148 in 60e3c92

function setRequireCustomerId(bool value) onlyOwner {

BitHeroToken/contracts/Crowdsale.sol

Line 159 in 60e3c92

function setRequireSignedAddress(bool value, address _signerAddress) onlyOwner {