Headers and library sources from all versions of Lightspeed C and THINK C

commits

Import Symantec THINK C 6.0.1 tags/think_c-6.0.1 heads/think_c-6.0.1 main
Import Symantec THINK C 5.0.2 tags/think_c-5.0.2 heads/think_c-5.0.2
Import THINK C 5.0.1 tags/think_c-5.0.1 heads/think_c-5.0.1
Import THINK C 4.0 tags/think_c-4.0 heads/think_c-4.0
Import Symantec Lightspeed C 3.01 tags/lightspeed_c-3.01 heads/lightspeed_c-3.01
Import Lightspeed C 2.15 tags/lightspeed_c-2.15 heads/lightspeed_c-2.15
Import Lightspeed C 2.01 tags/lightspeed_c-2.01 heads/lightspeed_c-2.01