Use "atom.workspace.addBottomPanel"

Use "atom.workspace.addBottomPanel"

"atom.workspaceView.append" isn't available any more and resulted in the
following error message:

Uncaught TypeError: Cannot read property 'append' of undefined

At .../lib/command-view.coffee:55

TypeError: Cannot read property 'append' of undefined
  at CommandView.module.exports.CommandView.initialize (.../lib/command-view.coffee:55:23)
  at CommandView.View (.../node_modules/atom-space-pen-views/node_modules/space-pen/lib/space-pen.js:184:25)
  at new CommandView (.../lib/command-view.coffee:6:3)
  at Object.module.exports.run (.../lib/pipe.coffee:17:9)
  at atom-workspace.<anonymous> (.../lib/pipe.coffee:9:57)
  at CommandRegistry.module.exports.CommandRegistry.handleCommandEvent (.../Applications/Atom.app/Contents/Resources/app.asar/src/command-registry.js:241:29)
  at .../Applications/Atom.app/Contents/Resources/app.asar/src/command-registry.js:3:61
  at CommandPaletteView.module.exports.CommandPaletteView.confirmed (.../Applications/Atom.app/Contents/Resources/app.asar/node_modules/command-palette/lib/command-palette-view.js:159:32)
  at CommandPaletteView.module.exports.SelectListView.confirmSelection (.../Applications/Atom.app/Contents/Resources/app.asar/node_modules/atom-space-pen-views/lib/select-list-view.js:338:21)
  at space-pen-div.atom.commands.add.core:confirm (.../Applications/Atom.app/Contents/Resources/app.asar/node_modules/atom-space-pen-views/lib/select-list-view.js:109:19)
  at CommandRegistry.module.exports.CommandRegistry.handleCommandEvent (.../Applications/Atom.app/Contents/Resources/app.asar/src/command-registry.js:241:29)
  at .../Applications/Atom.app/Contents/Resources/app.asar/src/command-registry.js:3:61
  at KeymapManager.module.exports.KeymapManager.dispatchCommandEvent (.../Applications/Atom.app/Contents/Resources/app.asar/node_modules/atom-keymap/lib/keymap-manager.js:520:16)
  at KeymapManager.module.exports.KeymapManager.handleKeyboardEvent (.../Applications/Atom.app/Contents/Resources/app.asar/node_modules/atom-keymap/lib/keymap-manager.js:355:22)
  at HTMLDocument.module.exports.WindowEventHandler.onKeydown (.../Applications/Atom.app/Contents/Resources/app.asar/src/window-event-handler.js:180:20)