Added GLPK library and javadocs
Added GLPKSolver in optimization.solvers and added stubs
GLPKSolver implemented

MOST now uses GLPKSolver instead of GurobiSolver
GLPKSolver now optimizes both FBA and GDBB
removed debug output for GLPK

GurobiSolver callback will now ignore Gurobi when isAbort = true
Refactored GurobiSolver
improved commentation
removed deprecated library
resolving merge conflicts

merging with "https://github.com/jimkell/MOST"
Merge https://github.com/CodeGuro/MOST
Pulled in CodeGuro changes