Merged in CodeGuro changes
Reactions with invalid spacing w/ regard to arrow...

displayed, highlighted red. Suspicious metabolites highlighted orange.
ecoli_core_model_ext has metabolites ending with "_b" boundary condition
set to true and optimizes. Original model does not.
Rearranging of columns in Model Collection table...

by dragging disabled. First two columns widths increased.
SolverSetUpDialog added
Removed Gurobi Path Interface. Gurobi button....

grayed out if no Gurobi environmental variable set.
Gurobi button only enabled if installed...

and version number is sufficient.
Solver selection works
Solver = solver name works in console...

GDBB not working at all for Gurobi, some bugs with GLPK, all have to do
with log files.
Gurobi Solver now prompts a message when model is unsolvable
MOST had some dependency issues with log4j
This reverts commit e2e6dd47b382da3b14e1879928e85dea045dd8c4.