New directory lagrange_sqcurve, initial commit.

modified:   .gitignore - added new executables for the new directory.

new file:   Makefile.am
new file:   loop_sqcurve_po.sh
new file:   loop_sqcurve_po_catres.sh
new file:   loop_sqcurve_van.sh
new file:   loop_sqcurve_van_catres.sh
new file:   sqcurve_po.cc
new file:   sqcurve_van.cc
Updated both loop_sq_po.sh and loop_sq_van.sh

They are so pimped out, they can continue tests after an interruption,
they keep track of what has been done and shit. Oh man I want to marry
them so bad like...