Greenswitch

What's Changed
* Adding support to linger timeout by kalmik in https://github.com/EvoluxBR/greenswitch/pull/91


**Full Changelog**: https://github.com/EvoluxBR/greenswitch/compare/v0.0.16...v0.0.17

* Bug fix - See 82

Enhancements:
- Configurable timeout for InboundESL (71)

Bug Fixes:
- fix compatibility with python 2 and 3 (76)
- fix encoding of readme (75)
- Fix error when stop() is called on certain conditions (70)