v0.2.0

• Added CPU usage
• Memory is now an object:
  mem: { private: 56572688, virtual: 78923543, usage: 0.33 }
• All units are now the same (no more mixed bytes and kb's)
• Greatly refactored code into a more modular approach
• Added JSHint
• Added Istanbul (100% code coverage)
• Integrated with Travis
• Integrated with Coveralls