2 dimensional rigid jointed frame analysis class
* Class Inheritance
* -> [Frame2D]
* [FEMSolver] is base class and includes several matrix operation for the standard FEM solutions.
* [Frame2D] is a class for the FEM solution process and include data structure of 2 dimensional rigid jointed Frame.
* [Frame2D] use [CSV] class for handling csv file to store and retrieve associated arrays;
* Solution process run for the loaded truss to analyse deformations, reactions and element forces.
* Multiple load cases will be solved simultaneously.
* Html result tables are generated during the process.
* Model of 2d Frame can be generated within class by assigning values to variables.
* Or model can be created by loading CSV file.
* Model csv file is very simple comma separated text file in-wich the properties of FEM element, boundary conditions and loads are written.