Version 0.9.9.9 released

This version is contains a number of additions, bug fixes and performance improvements since version 0.9.9.5.

• Lots of bug fixes
• Performance improvement
• See history.txt for details

0.9.9.6:
- Added PERF/LOOPBACK protocols

0.9.9.7:
- New TOTAL protocol (by John Georgiadis)
- MERGE protocol (Gianluca Collot)

0.9.9.8:
- Added Trace module (by Jim Menard)
- Added PBCAST protocol
- Added FD_PID protocol (for PID-based failure detection)

0.9.9.9:
- Added ANT-based platform-independent build system (by Filip Hanik)
- Added pbcast/{NAKACK,STABLE} protocols
- Reduced traffic for FD_PID/STABLE protocols