Migrate functions to Julia

[imciner2]

• discretization/c2d_weights.m
• optimal/inverseLQR/inverseCLQR.m
• optimal/inverseLQR/inverseCLQR_feasible.m
• optimal/inverseLQR/inverseCLQR_infeasible.m
• optimal/inverseLQR/inverseCLQR_modeMatching.m
• physicalSystems/continuous/sysc_InvPend_01.m
• physicalSystems/continuous/sysc_OverheadCrane_gradient.m
• physicalSystems/continuous/sysc_OverheadCrane_linear.m
• physicalSystems/continuous/sysc_SpringMass.m
• physicalSystems/discrete/sysd_BallOnPlate.m
• physicalSystems/discrete/sysd_JonesMorari.m
• physicalSystems/discrete/sysd_linear_CSTR1.m
• physicalSystems/discrete/sysd_linear_CSTR2.m
• stepResponseAnalysis/settlingIndexAnalysis.m
• systemAnalysis/and_sigma_min.m