added __pycache__ to ignore

test cases for both 1d and 2d

A second version of calc_l2_distance in the GQ class. Also added __init__ files.

Added fem codes

Added fdmcodes

Rearrangement

Renamed the LU functions according to KIJ and IKJ versions of the algorithm.

Added a basic lu-with-no-pivot and a basic ilu

Few new routines

Initial commit