Version 0.4.0

structural damping using alpha*M + beta*K with alpha and beta determined based on pre-selected modes, which are determined from a non-damped flutter analysis
simplify and unify setup.py for compmech.conecyl.clpt
simplify and unify setup.py for compmech.conecyl.fsdt
finish implementing compmech.aero.pisonplate
finish implementing compmech.aero.pisonstiffpanel
tune eigenvalue solver for freq in compmech.aero, similarly to what has been done for linear buckling analysis....
fix mass matrix (kM) calculation for compmech.aero.pisonstiffpanel.fsdt. The rotation degrees of freedom should not use F = m*a, but another relation to consider the rotational energy properly
skew panel with formulation for stringers not aligned with the panel longitudinal direction

Version 0.5.0

make an installable setup.py
add Third-Order Shear Deformation Theory to deal with many papers using shear correction factors