Added tests for GetOpenSSLCert
Added getCommonName, getValidFrom and getValidTo functions to Cert Class

The Valid functions both return DateTime objects, while the CommonName
one returns a string.
Added Util class, with getDateFromSSLFormat function

This function returns a DateTime object based off of the SSL timestamp
format.
Formatting
Added proper exceptions into the CertFactory class
Formatting
Merge pull request #4 from tedivm/cert_buildout

Built out the Cert class