Opentok

Added `resolution` parameter for `start_archive`
Added `signal` API
Added `force_disconnect` API
Added `get_stream` API
Added `list_streams` API

Thanks normanargueta and maikthomas

- Add timeout option to opentok constructor (117, 57 Thanks tylergould!)

Changes:

- Exceptions now inherit from `Exception` instead of `BaseException` (115, thanks fernandogrd)

As well as:

- Update archive documentation (80)
- Document the `initial_layout_class_list` param for the `generate_token` function (112)
- Refactor sample app (111)

This updates includes the following changes:

- [Adds support for the `initial_layout_class_list` field in tokens](https://github.com/opentok/Opentok-Python-SDK/pull/77)
- [Adds support for JWT `X-OPENTOK-AUTH` header, replacing the deprecated `X-TB-PARTNER-AUTH` header](https://github.com/opentok/Opentok-Python-SDK/pull/86)
- [Updates the REST API endpoint URL to use `/project/` replacing the deprecated `/partner/`](https://github.com/opentok/Opentok-Python-SDK/pull/105)
- [Only include connection data in generated token if it's been defined](https://github.com/opentok/Opentok-Python-SDK/pull/106)
- [Ensure backwards compatibility with Python 2.6](https://github.com/opentok/Opentok-Python-SDK/pull/91)
- [Removes Python 3.2 from supported version because it's not supported by our dependency](https://github.com/opentok/Opentok-Python-SDK/pull/105)

As well as:

- [Updates JS code in samples to use latest API and best practices](https://github.com/opentok/Opentok-Python-SDK/pull/108)
- [Fix broken image paths in sample](https://github.com/opentok/Opentok-Python-SDK/pull/104)

This update adds support for the `initial_layout_class_list` field in tokens.

This update adds version information to the User-Agent string for analytics (78)