init
optimize and add some comments
edit comment
add readme
edit method name
fix bug: require module error
bump 0.4.2
add unimport method
remove older version by default
bump 0.4.4
fix recursive call bug
fix bug: when a package is latest, update process will stoped
update less/css`s import
bump 0.4.6
add import-from-package
update doc for importFromPackage
bump 0.4.7
edp-package Issue #2
edp update命令增加confirm
Merge pull request #4 from ielgnaw/master

edp-package Issue #2 edp update命令增加confirm
1. 当前目录下没有dep时，优化提示信息
2. 修复会一直update相同版本的情况