Changelog for MIP

Unreleased changes

0.1.1.0

• re-export Default class from Numeric.Optimization.MIP.
• fix to work with recent version of CBC
• generalize type of parseLPString and parseMPSString

0.1.0.0

• Separated from toysolver package https://github.com/msakai/toysolver/tree/7096038ece0a5f860a951567689ef9a03ac0355d