pull changes from v8 3.22.24.19
add os.system wrapper (used to launch nm)
add simple script to profile + sample v8 log fixture
handle both 0.10 and 0.11 profiles #3 #4 #10
Merge pull request #20 from sidorares/0.11.x

0.11.x
timeline gnuplot generation
timeline gnuplot generation - make use of buffered input
(cherry picked from commit 772f79a)
rename variable to make them different not just by letters case