Implements system calls sem_init and sem_destroy.
Implements sem_wait and sem_signal system calls. All tasks for E2.checkpoint are implemented but not 100% tested.
Merge branch 'master' of github.com:griera/zeos
Implements sem_wait and sem_signal system calls. All tasks for E2.checkpoint are implemented but not 100% tested.
Merge pull request #22 from griera/master

Implements system calls sem_init and sem_destroy.