release v3.3

v3.2 release (uswitch#231)

increment proxy success count metric (uswitch#224)

release v3.0

Add proxy whitelist blocking metric (uswitch#186)

*  add metric for proxy blocking based on regexp

* fix metric names. register missing metrics

improve event errors

fix proxy whitelisting

a few small changes

add new rc; contains missing whitelisting metadata api support

3.0 rc1 release