Feature Request: Specify profiles for new windows / panes

[j1mmie]

Since iTerm supports profiles for windows and tabs, it could be helpful in an itermocil config to be able to specify which profile to use for a window or pane.

For example:

windows:
  - name: profiles_test
    root: ~
    layout: main-horizontal
    panes:
      - name: Top
        profile: "Top-Profile"
        commands:
          - echo "I'm the top"
      - name: Bottom
        profile: "Bottom-Profile"
        commands:
          - echo "I'm the bottom"

This way, the user could specify different colors / themes using iTerm2 profiles. For example: