defaultAppenderClassName: NGLogStderrAppender

Change NGLogAppender fallback appender to NGLogStderrAppender
Merge branch 'master' of https://github.com/inverse-inc/sope
Add support for LDAP URLs and tweak exception code

handle is now a LDAP*
_reinit: use ldap_initialize if provided with a ldap url
_exceptionForErrorCode: replace handrolled solution  with ldap_err2str
startTLS: raise an exception if ldap_start_tls_s fails
Callers should be updated to do something useful with this exception.