support operation of subfolder project

[50tonrobot]

[Enter steps to reproduce below:]

1. Open a file from a subfolder of a project directly (not having the project open).
2. Try to download or upload the file.

Atom Version: 0.209.0
System: Mac OS X 10.10.3
Thrown From: remote-sync package, v3.1.2

Stack Trace

Uncaught TypeError: Cannot read property 'downloadFile' of undefined

At /Users/mike/.atom/packages/remote-sync/index.coffee:64

TypeError: Cannot read property 'downloadFile' of undefined
  at handleEvent (/Users/mike/.atom/packages/remote-sync/index.coffee:64:29)
  at atom-workspace.disposables.add.atom.commands.add.remote-sync:download-file (/Users/mike/.atom/packages/remote-sync/index.coffee:77:42)
  at CommandRegistry.module.exports.CommandRegistry.handleCommandEvent (/Applications/Atom.app/Contents/Resources/app.asar/src/command-registry.js:238:29)
  at CommandRegistry.handleCommandEvent (/Applications/Atom.app/Contents/Resources/app.asar/src/command-registry.js:3:61)
  at CommandRegistry.module.exports.CommandRegistry.dispatch (/Applications/Atom.app/Contents/Resources/app.asar/src/command-registry.js:153:19)
  at [object Object].jQuery.fn.trigger (/Applications/Atom.app/Contents/Resources/app.asar/src/space-pen-extensions.js:64:23)
  at EventEmitter.<anonymous> (/Applications/Atom.app/Contents/Resources/app.asar/src/window-event-handler.js:75:67)
  at emitTwo (events.js:87:13)
  at EventEmitter.emit (events.js:169:7)
  at EventEmitter.ipc.sendSync (/Applications/Atom.app/Contents/Resources/atom.asar/renderer/api/lib/ipc.js:21:31)
  at BrowserWindow.RemoteMemberFunction [as emit] (/Applications/Atom.app/Contents/Resources/atom.asar/renderer/api/lib/remote.js:110:29)
  at ContextMenuManager.module.exports.ContextMenuManager.showForEvent (/Applications/Atom.app/Contents/Resources/app.asar/src/context-menu-manager.js:170:31)
  at HTMLDocument.<anonymous> (/Applications/Atom.app/Contents/Resources/app.asar/src/window-event-handler.js:148:33)
  at HTMLDocument.handler (/Applications/Atom.app/Contents/Resources/app.asar/src/space-pen-extensions.js:112:34)
  at HTMLDocument.jQuery.event.dispatch (/Applications/Atom.app/Contents/Resources/app.asar/node_modules/space-pen/vendor/jquery.js:4681:9)
  at HTMLDocument.elemData.handle (/Applications/Atom.app/Contents/Resources/app.asar/node_modules/space-pen/vendor/jquery.js:4359:46)

Commands

Config

{
  "core": {
    "projectHome": "/workspace"
  },
  "remote-sync": {}
}

Installed Packages

# User
atom-alignment, v0.12.1
highlight-selected, v0.10.0
remote-sync, v3.1.2

# Dev
No dev packages