Added menu listener to Analysis menu...

Will be used to test click on menu setting top item on tree as selected.
minor bug in GLPKSolver with the fixed constraints
Updated solution output text for clarity on solver selection
GLPK is now compatible with E-Flux2

Eflux-2 will now give identical results regardless of which solver is used
SPOT optimization patch

for all g_i that is infinity in vector 'gene expression data', replace with 0