0.1.0.0- first stable release

This is the first stable release of stack, intended for general purpose development by people with good Haskell experience. This release mostly focuses on bug fixes and performance enhancements, but also includes some new features from last week:

• Fall back to cabal dependency solver when a snapshot can't be found
• Basic implementation of stack new #137
• stack solver command #364
• stack path command #95
• Haddocks #143:
  • Build for dependencies
  • Use relative links
  • Generate module contents and index for all packages in project