Expand test suite

[jimeh]

As of #46 there's a decent test framework/skeleton and some basic tests added, but more are needed.

Todo

Below is an overview of things in need of tests along with the current test status.

• Basic test framework setup.
• Main tmuxifier executable in bin folder.
• Files in lib folder:
  • env.sh
  • layout-helpers.sh:
    • tmux()
    • new_window()
    • split_v()
    • split_h()
    • split_vl()
    • split_hl()
    • clock()
    • select_window()
    • select_pane()
    • send_keys()
    • run_cmd()
    • session_root()
    • window_root()
    • load_window()
    • load_session()
    • initialize_session()
    • finalize_and_go_to_session()
    • __expand_path()
    • __get_first_window_index()
    • __get_current_window_index()
    • __go_to_session()
    • __go_to_window_or_session_path()
  • runtime.sh
  • util.sh
• Files in libexec folder:
  • tmuxifier-alias
  • tmuxifier-commands
  • tmuxifier-completions
  • tmuxifier-current-session
  • tmuxifier-edit-session
  • tmuxifier-edit-window
  • tmuxifier-help
  • tmuxifier-init
  • tmuxifier-list
  • tmuxifier-list-sessions
  • tmuxifier-list-windows
  • tmuxifier-load-session
  • tmuxifier-load-window
  • tmuxifier-new-session
  • tmuxifier-new-window
  • tmuxifier-resolve-command-path
  • tmuxifier-tmux
  • tmuxifier-tmux-version
  • tmuxifier-version