Linear Programming with LPsolve

The lpsolve library has been integrated into TinkerCell. The code is in c/lpsolve.c and the lpsolve package is included in the c/lpsolve directory. 

The generic outline of the code is as follows:

• get selected connections (error if none)
• get stoichiometry for all items
• find columns of the stoichiometry corresponding to selected items
• setup lpsolve with the selected connections as the objective 
• setup lpsolve with the stoichiometry as the constraint
• solve
• get the optimal values and post them on the screen using tc_displayText