rglpk 0.4.0

# Introduction Rglpk is a package providing a Ruby wrapper to the [GNU GLPK](http://www.gnu.org/software/glpk/) library. The GLPK (GNU Linear Programming Kit) package is intended for solving large-scale linear programming (LP), mixed integer programming (MIP), and other related problems. Rglpk (pronounced as "wriggle-pick") is currently in alpha status and the API should be considered subject to change. Rglpk uses [Swig](http://www.swig.org/) to initially wrap the C GLPK library (using a Swig wrapper originally developed by Nigel Galloway) and then a pure Ruby library to wrap the Swig code in a more friendly OO-style.