phase of reset versus clock matters! (broke half_clock_gen in tile_traffic_gen)
1.) Extended Makefile
2.) Default slot table length increased to 32 to support the 23-entry 4x4 all-to-all schedule.
3.) Test cases:
-Restructured, these should now reside in common/test/<testcase_target_name>/
-Longer runtime for the test2 test case to ensure transfer completion with the  longer slot table.
-Test case for 2x2 tiled noc added
-Traffic generator initialization files moved to config.vhd