Source by alex
Simplify A matrix a bit
Add flags for sliding/rolling calculation
Simulation settings
Normalize contact pointers
get functions for F/M
Ignore alex' binary
DEBUG flag in contact for test_collision2 example
Updated test_collision2 example
Take T_max as arugument in load_binary
Rename alex' directories
missing Makefile for alex' source
Remove contact IDs from debug output
Remove trailing ^M
Use numeric calculation of contact radius "a"
Make everything public when DEBUG is defined
New tests for contacts (contact radius)