add some ec/dsa info to the readme
yard doc fixes
more doc work
remove 1.8.7 and ree testing and note support being dropped (due to EC)
add dsa signing test to ca
large refactor of R509::Crl

Much of the logic in R509::Crl::Administrator was moved to
R509::Crl::SignedList and R509::Crl::Parser was renamed to
R509::Crl::SignedList. This breaking API change also requires an update
to r509-ca-http (already in master)
4 spaces => 2 on the yaml files [ci skip]
yardoc flag to hide the monkeypatched OpenSSL module from the docs [ci skip]
Include the VERSION constant so you can see the version programmatically

Update gemfile with 0.8.3 yard
improved docs [ci skip]