QuickThreads 003: Changes since QuickThreads 002.

 - Added portable version based on setjmp and alloca.
 - Added the stub version.
 - simplified makefile system.
 - Modified sparc version and qt.c to eliminate leading _ dependency.
 - Eliminated the iter counts for meas by using a better timer.

QuickThreads 002: Changes since QuickThreads 001.

 - Now can be used by C++ programs.
 - Now *really* works with stacks that grow up.
 - Supports AXP OSF 2.x cc's varargs.
 - Supports HP Precision (HP-PA) on workstations and Convex.
 - Supports assemblers for Intel iX86 ith only '//'-style comments.
 - Supports Silicon Graphics Irix 5.x with dynamic linking.
 - Supports System V and Solaris 2.x with no `_' on compiler-generated
   identifiers; *some* platforms only.

Note: not all "./config" arguments are compatible with QT 001.


QuickThreads 001: Base version.
