Fix leader bind

Fixed

• leader bind now runs without error in directories without a .leaderrc
• leader does not exit anymore when the size of the terminal changes

Improvements for zsh

Fixed

• The zsh prompt is redrawn after leader exits. This fixes #1
  

Add `leader bind` subcommand

Added

• Improved fish support: Ctrl+V\ inserts a literal \, like in bash and zsh.
• Added leader bind to add new key bindings without invoking an editor
• Added leader bind --unbind to remove key bindings without invoking an editor

Fixed

• Unknown command line arguments now cause leader to exit and display a message about where to get help.

Add `leader version` and fix various bugs

Added

• Added leader version command to output the current version of leader. This is necessary to help
  people who report issues on Github.

Fixed

• Fixed crash when pressing \ in bash anywhere but on an empty command line
• Fixed looping keys nested under the same key going to the parent menu: e.g. j j where the second
  j is listed under loopingKeys actually listed the menu of the first j.
• Fixed configuration file load order: less specific configuration files were loaded after more
  specific configuration files (except for $HOME/.leaderrc), which broke expected configuration behavior
• Fixed @KEYS to execute a command if any of the characters in KEYS point to a key that is bound to
  a command instead of a key map.

Add support for fish

Added

• Restore terminal state and exit when receiving a signal
• Add support for fish

Fixed

• Terminal state wasn't properly restored sometimes. After removing stty sane from the
  shell-specific input wrappers the problem disappeared.

Release v0.1.4

Added

• Restore terminal state after each invocation of leader (requires stty)
• Add leader help subcommand

Fixed

• Fix configuration load order: project-local overrides were broken

v0.1.3: Add list-keys subcommand

Leader now supports listing all configured key bindings by running
leader list-keys.

Improved shell integration

• Pressing \ while inside a quoted string does not invoke leader
• leader init prints shell initialization code for bash and zsh

v0.1.1

* Improvement: remove menus from scrollback buffer

v0.1.0

Correctly name binaries for release