Merge pull request #158 from quintonm/master

Fix for #157 & #139
Merge pull request #161 from quintonm/master

Issue #157 - Vendor specific methods are not available through proxy
Merge pull request #162 from quintonm/master

Issue #139 - outdated docs - "known issues" section for 2.0
Merge branch 'master' of https://github.com/p6spy/p6spy