fix dev-install target (by @tvn87 in #138)
additional logging (by @tvn87 in #138)
fix error from cleaning up workspace (by @tvn87 in #138)
moved some xdg/data/ entries under shellshape/data to avoid having to move or link these manually for a git install
add a direct _on_window_remove that is called immediately during cleanup (no overview ducking)