Allow different paths as possible system certificate store.

Because no unixes can do it the same way.
Fixes #26, Fixes #23, Fixes #19.
for my own benefit, add a copy pastable line for reinstalling all the x509 packages
add extensionGetE that returns the error.
add extra AltNames (XMPP and DNSSRV)
bump version to 1.4.13
bump version to 1.4.6
pretty print ASN1 in extension
use the new extensionGetE to allow error reporting
pretty print with more syntax ([] for set, {} for sequence, <> for container)
bump version to 1.5.1