Adding change log. v2.0.0-beta3 available.
Adding change log. v2.0.0-beta3 available.

Signed-off-by: Ben Corlett <9fc0b04505a02c47a9e61f970105683228d674a6@me.com>

halfik/sentry,gazsp/sentry,cartalyst/sentry,anndro/SentryLdap,BootstrapCMS/Sentry,intrip/sentry,jgodish/sentry