0.2.1

• Added the deleteFilesByDefault option to all top level methods. This will
  skip the prompt to delete files, and instead act as if you responded y.
  • Also by default in a non-console environment the prompt no longer exists and
    it will instead just exit with an error.
• Added support for multiple build scripts. Each script now has its own asset
  graph based on a hash of the script uri.
  • You need to be careful here, as you can get in an infinite loop if two
    separate build scripts keep triggering updates for each other.
  • There is no explicit link between multiple scripts, so they operate as if
    all changes from other scripts were user edits. This will usually just do
    the "right thing", but may result in undesired behavior in some
    circumstances.
• Improved logging for non-posix consoles.