Low - 'if(!condition) throw;' should be avoided

[k4ms]

This concerns many occurrences in source files MultiSigWallet.sol and MiniMeToken.sol.

There are several reason to use 'require(condition);' instead of 'if(!condition) throw;' :

1. Faster execution, consumes less gas

2. More clear : 'throw' naming is perturbing because it does not throw an exception that we can catch.

3. Solidity will certainly deprecate throw (Deprecate throw and suggest revert()/assert()/require() instead argotorg/solidity#1793).

[jbaylina]

MultiSigWallet.sol and MiniMeToken.sol are standard contrancts. We took the decission not to touch those contracts unless a critical issue it's found.