Add Lagrange Neville interpolation
added examples for Neville Interpolation
bulirsch stoer interpolation method

implementation and examples
fixed Bul/Stoer interpolation...

return node value of depend variable is close to node
Added OdeResult which also allows for easier use of the memorization

Added OdeResult; Use interpolation on the memorized data
Interpolation result; numerical differentiation; polynomials
power series : monomial and functions
Chebeyshev series (barycentric and polynomial) as function approximation
check in main
Merge branch 'dvlp'
merging with dvlp branch