chg: fix bug in evaluation point search
fix: int overflow
fix: wrong computation of pth root due to int overflow
chg: added test for bug 482
chg: updated test results
fix: bug in log derivative computation over field extensions
Merge pull request #314 from mmklee/factory_bugfix_sw

Factory bugfix sw
Replaced some system calls by safely wrapped versions

from master
add: handling signals in systyem calls