Marlin v0.1.1

Added

• Dragging files in from Finder types their paths into the pane you dropped them on, quoted for
  the shell and followed by a space, so a drop finishes a half-written command instead of
  running one. The pane under the cursor lights up while the drag is over it.
• Check for updates in Settings, and the button that tells you a version exists is the button
  that installs it: it downloads the disk image, replaces the app in place and relaunches.
  Nothing is sent but one GET to a static file.
• A workspace panel in the sidebar. Open a folder holding several repositories and each one
  lists its branch, how far ahead or behind it is and how many files have changed, expandable to
  the files themselves. The scan runs in parallel in Rust, so nine repositories cost one call.
• Quitting asks first, from every route: ⌘W on the last pane, ⌘Q, the red button and the
  menu's Quit all reach one confirmation. The dialog names what is live — panes, tabs, what is
  still running, what is waiting, what has unsaved changes — because quitting is only a real
  decision if you can see what you are throwing away.

Fixed

• Typing was a character behind. The pty reader coalesced output by issuing a second read before
  emitting, and a read on a pty master blocks, so the echo of every keystroke sat in a buffer
  until the next keystroke arrived to release it. Reading and emitting are now separate threads
  either side of a channel: asking "is there more?" is a try_recv that answers instantly, so a
  lone keystroke goes straight through and a flood still collapses into one message.
• Output split across a read boundary in the middle of a multi-byte character no longer turns it
  into a replacement character. The incomplete tail is held for the next chunk.
• ⌘W on the last pane used to do nothing at all. It now reads as an attempt to quit, which is
  what it is.
• The workspace scan test pointed at whatever happened to sit above the repository, so it passed
  or failed on how the person running it arranges their projects folder. It builds its own
  repositories in a temporary directory now.