DMTCP 1.1.0 Released

* TID-Virtualization supported with improved PID-Virtualization. Also works for OpenMPI.
* IPv6 fixes for supporting OpenMPI 1.3.x. (OpenMPI now works with DMTCP.)
* changed fork to vfork for gzip spawning for handling programs with huge memory.
* Process Group / foregroud process restored at restart.
* Support for system() updated.
* Some new configuration options
* Several other bug fixes / enhancements.