+ create new subkey object with relative path.
* update version to 7.9.1
* update readme
Merge branch 'release/7.9.1'
* move type check functions to util.js
* update readme
Merge branch 'develop' into feature/v8
+ removeListener, subkey on nut
+ inherits function to util
+ rewrite the shell.js
* Change shell arguments to (nut, createReadStreamProc) and return Subkey Class(not Subkey Object instance)
+ shell WriteStream argument added: shell(nut, aCreateReadStream = ReadStream, aCreateWriteStream = WriteStream)
* [bug] some inherits fixed
+ isInheritedFrom, inheritsObject function
+ unit test for util
* Call Subkey func will cache to nut now
* [bug] inheritsObject should be always adjust the proto to aClass
+ isEmpty function and test
* remove noneed codes
+ parent() to Subkey
* [bug] minor bugs fixed.
+ codec/separator.js
* parent() return the latest parent now.