Refactored and simplified scalarvolume.frag
Added color mixing ratio and refactored scalarvolume.frag
Updated visualizer and test
Updated development test
Updated test
Updated O2H config
Added back DIIS procedure from Milad's implementation
Added options to DIIS
Disabling DIIS by default
Added back DIIS as default and set rand coeffs
Not using DIIS for energy offset
Using densityMixFactor() in UnrestrictedHartreeFockSolver
Updated plot and added basis functions