upgrade dependencies close #15
change getFileInfo -> getFile, originPath -> history[0] #16

get the father file object from vinyl object
PluginError > Error for removing gulp-util
remove gulp
using file object of father when transportId
using file object of father when transportDeps
improve error message
bench
skip when file is null #13
update package
fix testcase
Merge pull request #17 from popomore/0.8.x

0.8.x