Fix raising piper errors
Specify default encoding
Mock HTTP responses with VCR
Merge pull request #428 from nanoc/bug/specify-default-encoding

Specify default encoding
Merge pull request #429 from nanoc/use-vcr-in-tests

Mock HTTP responses with VCR
Merge branch 'release-3.6.x'

Conflicts:
	Gemfile.lock
	lib/nanoc/cli/commands/create-site.rb