helper application for finding cert chains

because neither M2crypto nor OpenSSL packages provide extensive
enough API to do certificate chain building, verification
and outputting of details, we have to pre-parse the data
with a C app that can access the full OpenSSL API.

I've also tried monkey patching the packages, but unfortunately
the result wasn't working reliably

The actual statistic collection (both about the chains and
specific certificates) will be done in a python script
collect statistics about found certificates
process-certificate-statistics.sh - the script HOWTO to turn results to CA stats
add Makefile for the C utility
parse_CAs.py - add few comments
parse_CAs.c - implement error checking, remove magic numbers, compile fix
Merge pull request #28 from tomato42/certificate-stats

Certificate stats