Add Transfer event when token is minted

Move truffle-hdwallet-provider to devDependencies

Change crowdsales to use timestamps instead of block numbers #350

Added contracts/token/BurnableToken.sol

Fix typo in SafeMath doc

Add missing parentheses in modifier

tests

Remove return values of pause() and unpause() of Pausable

Add complex crowdsale example #331

Move examples to separate directory

Upgrade truffle to 3.4.6

Remove MultisigWallet in favor of ConsenSys/MultiSigWallet

Fix test script cleanup and portability

Remove coveralls token

because when we interrupt the tests via ^C, the signal also kills the
background process

fix testing error throwing