Updated to 1.55
Add some logic to deal with removal of CAs, to prevent leftover symlinks
in /etc/grid-security, and leftover CRLs.
fixed typo in postinst, reduced line length in changelog
change namespace to namespaces
fix matching the pem file to the crl file.
include .0 in the list of extensions to clean up.
include subject_hash_old in list of CAs to clean up.
Update to 1.56 (new upstream release)

Changes from 1.55 to 1.56
-------------------------
(31 March 2014)

* Removed discontinued SWITCHslcs2011 and associated Root (CH)
* Removed discontinued APAC CA (AU)
* Removed discontinued DoEGrids CA and ESnet root (US)
* Add reference to CA website for AustrianGrid CA (AT)
* Add new subordinates for DigiCert: 1cdf1cd9/DigiCertGridCA-1G2-Classic
  and 5d9ea26d/DigiCertGridTrustCAG2-Classic (US)
* Add meta-package for the IOTA-accredited CAs. Please note that there
  are no IOTA accredited CAs as this point in time. For specifications see
  https://www.eugridpma.org/guidelines/IOTA/
* Debian packaging dependencies in meta-packages now correctly use all-
  lower-case package names throughout
update to Debian policy 3.9.5