Retain file stats when copying (close #235)
Catch errors while setting permissions
async used in Base.run.
Merge pull request #255 from SBoudrias/issue-254

Fix Windows generator namespacing (#254)
code style
Merge pull request #253 from stephenplusplus/callback

async used in Base.run.
minor changes to improve comments, readme
Merge pull request #236 from passy/copy-modes

Retain file stats when copying
Merge pull request #256 from SBoudrias/255-unit-test

Fix regexizePath so it escape '.' character
remove unnecessary argument.
Merge pull request #258 from stephenplusplus/callback

remove unnecessary argument.
Refactor env.namespace