addressed the problem that Koen discovered about sys/linux-syscalls.h
needed to modify makefile.syscalls.am, and slightly altered gensyscalls.py, to fix the build-system bug Koen found. organized ucontext.h
slight revert on makefile.syscalls.am, so that generated syscalls are deleted still... seems kind of messy, might want to revisit later
Merge pull request #28 from cfriedt/master-local

fix the build system bug that Koen found (linux-syscalls.h missing), and a couple of other small things