Fix typo
Make path stripping optional in `.extract()`

Fixes #664.
Merge pull request #665 from kevva/strip-dirs

Make path stripping optional
Fix code inconsistencies in tests
Proof of Concept: fix generator.invoke

Create a new `runLoop` for the invoked generator.
Fix Base#hookFor() method and cleanup invoke fix

Add Environment#duplicate() to create performant copy of a complete
environment.
Remove unecessary use strict statement
Notify the user when changing the scaffolding root directory
0.17.7
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  0.17.7
  Notify the user when changing the scaffolding root directory
  Remove unecessary use strict statement
  Fix Base#hookFor() method and cleanup invoke fix
  Proof of Concept: fix generator.invoke
  Fix code inconsistencies in tests
  Make path stripping optional in `.extract()`
  Fix typo