Prompt-toolkit

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New features:
- Handling of the insert key in Vi mode.
- Added 'zt' and 'zb' Vi key bindings.
- Added delete key binding for deleting selected text.
- Select word below cursor on double mouse click.
- Added `wrap_lines` option to TokenListControl.
- Added `KeyBindingManager.for_prompt`.

Fixes:
- Fix in rendering output.
- Reset renderer correctly in run_in_terminal.
- Only reset buffer when using `AbortAction.RETRY`.
- Fix in handling of exit (Ctrl-D) key presses.
- Fix in `CompleteEvent`. Correctly set `completion_requested`.

Backwards-incompatible changes:
- Renamed `ValidationError.index` to `ValidationError.cursor_position`.
- Renamed `shortcuts.get_input` to `shortcuts.prompt`.
- Return empty string instead of None in
`Document.current_char`/`char_before_cursor`.

New features:
- Mouse support
- Fish style auto suggestion.
- Optionally disabling of line wraps.
- Use Python3Lexer for Python 3.

Fixes:
- Correctly accept file parameter in the print function of
asyncssh_repl.ReplSSHServerSession.
- Create config directory if it doesn't exist yet (For IPython entry point.)

New features:
- Implementation of history-selection: a tool to select lines from the history.
- Make exit message configurable.
- Improve start-up time: Lazy load completer grammar and lazy-import Jedi.
- Make multi-column the default completion visualisation.
- Implementation of a custom prompts. In_tokens and out_tokens can be
customized.
- Made an option to show/hide highlighting for matching parenthesis.
- Some styling improvements.

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New features:
- Added MANIFEST.in
- Better support for multiline prompts in shortcuts.
- Added Document.set_document method.
- Added 'default' argument to `shortcuts.create_default_application`.
- Added `align_center` option for `TokenListControl`.
- Added optional key bindings for full page navigation. (Moved key bindings
from pyvim into prompt-toolkit.)
- Accepts default_char in BufferControl for filling the background.
- Added InFocusStack filter.

Fixes:
- Small fix in TokenListControl: use the right Char for aligning.

Backwards-incompatible changes:
- Removed deprecated 'tokens' attribute from GrammarLexer.

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New features:
- run_in_terminal now returns the result of the called function.
- Made history attribute of Buffer class public.
- Added support for sub CommandLineInterfaces.
- Accept optional vi_state parameter in KeyBindingManager.

Fixes:
- Pop-up menu positioning. The menu was shown too often above instead of below
the cursor.
- Fix in Control-W key binding. When there is only whitespace before the
cursor, delete the whitespace.
- Rendering bug fix in open_in_editor: run editor using cli.run_in_terminal.
- Fix in renderer. Correctly reserve the vertical space as required by the
layout.
- Small fix in Margin ABC.
- Added __iter__ to History ABC.
- Small bugfix in CommandLineInterface: create correct eventloop when no
eventloop was given.
- Never schedule a second repaint operation when a previous was not yet
executed.