Add --dry-run flag to clean
DRY up dry-run behavior in clean
Merge pull request #2237 from wfarr/dry-run-clean

Add --dry-run flag to clean
make --standalone's setup.rb ruby version agnostic /cc @carllerche
only hit RbConfig once vs every require for --standalone
don't check for existing binstubs, just overwrite during install
update changelog
bump 1.3.0.pre.5
Added --editor option to open generated gemspec in editor
Merge pull request #2224 from ndbroadbent/editor

Added --editor option to open generated gemspec in editor
Merge remote-tracking branch 'upstream/master' into helper