More brs

Added BRs for
* validPeriodTooLong // over 60 months
* key size <= 1024 bits
* exponent <= 3
* signatureAlgorithm contains "SHA1" in the description
* version != 3
We should probably figure out exactly what BasicConstraintsValid means. e.g. if there is no basic constraints extension, what is the value of BasicConstraintsValid?