jp: jp asyncio port: /!\ this commit is huge. Jp is temporarily not working with `dbus` bridge /!\ This patch implements the port of jp to asyncio, so it is now correctly using the bridge asynchronously, and it can be used with bridges like `pb`. This also simplify the code, notably for things which were previously implemented with many callbacks (like pagination with RSM). During the process, some behaviours have been modified/fixed, in jp and backends, check diff for details.

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*.pyc
*.pyv
*.swp
*.swo
tags
twistd.log
twistd.pid
bridge_constructor/generated
_trial_temp/
sat.egg-info
*.un~
dist
MANIFEST
build
ctags_links/
Session.vim