Vested Token implementation (Standard Token with vesting calendar)

Vesting test fixing help

BasicToken.sol: Remove useless check

The condition this commit removes is already implemented by the call to `safeSub`

Renamed files and replaced occurencies of 'Stoppable' to 'Pausable'

Make test cases that use assertJump fail if they dont fail

Refactor folders in preparation for external audit

Fix typos

On unrelated note, why on earth check like in safeAdd? Is it actually an overflow check?

Add tag comment on CONTRIBUTING.md

Fixes #116

DelayedClaimable contract extension of Claimable fix #64

Decouple Shareable from DayLimit

Create tests for MultisigWallet

fix link