Extend response override plugin capabilities

Give plugins access to response, original request information
Plugin extension update

Keep old plugin compat
Response override can block request
Rename v2 ResponseOverride
Merge pull request #31 from groupon/davidv/portfix

Merge davidv/portfix
merge master
Clean status plugin
Add response content helper
Exclude new properties from backup
Refactor common code in callFunction methods
add missing args
Merge pull request #33 from groupon/davidv/portfix

Database: Check isValid instead of just isClosed
Remove extra semicolon
update version for 1.0.0-beta.3 release
fix history column resizing
Merge pull request #32 from groupon/dwillson/12

Extend plugin support
Merge pull request #34 from groupon/dwillson/update

update version for 1.0.0-beta.3 release
fix response history logging
Merge branch 'master' of github.com:groupon/odo into dwillson/12
Merge pull request #35 from groupon/dwillson/12

Fix history logging with plugins
Flush response buffer on timeout path