started support for OS X Yosemite
Merge branch 'master' into feature/yosemite

* master:
  Adding proper dependencies to the install dmg files
  Adding templates for VirtualBox
  Update README.md
  XCode CLI Tools script: Add support for OS X 10.10
Initial support for building Yosemite guests

- In addition to growing BaseSystem and copying over Packages, we
  also copy the BaseSystem dmg and chunklist files to the root
  of this new grown BaseSystem (yes, a copy of its original at the
  root of itself).
  - My guess would be that this is so that the installer can use
    these to do recovery partition-related tasks, verification, etc.
    because without it, the installer would fail complaining that
    it could not verify the recovery partition.
  - Cribbed from the 'convert_mavericks_image' script from
    Parallels 10 - a much simpler approach than VMware Fusion's
    approach of setting up a second disk with a custom boot config.
- Fixes #17.
pkg postinstall ssh enable: new launchd overrides path on 10.10
added dependency to yosemite dmg
Build veewee-config.pkg as a Distribution package

- workaround for bug in Yosemite Installer (rdar://18491441, rdar://18493263)
- does not make a successful 10.10 install, but needs to be done regardless
pick only one xcode update if there are more
updated default iso_url
started support for VirtualBox builder
Merge pull request #3 from StefanScherer/feature/yosemite

started support for OS X Yosemite