Implemented support for Response Analyze Plugins
Added timing information to HTTP responses
Added elasticsearch response analyze plugin
More data for elasticsearch

- Removed extension based mime analysis
- Added more data fields for elasticsearch
- ESResponse is now a ESRequestResponse struct
(holds combined data from requests and responses)
Fixed elasicsearch plugin

Don't try to export failed requests
Merge branch 'elasticsearch' of https://github.com/gottwald/gor into gottwald-elasticsearch

Conflicts:
	replay/replay.go
	replay/request_factory.go