Continuation Core and Toolboxes (COCO) Code

improved performance by introducing cached data

Modified bvp toolbox to support user function data and auxiliary functions for initializing and updating this data for periodic orbit problem.

index arrays as columns

improved performance of coco_read_solution using cached data

working example of torus continuation with msbvp

updated marsden demo

new multi segment bvp toolbox

worked on plot data base

minor changes