init filesystem
Merge https://github.com/coreos/etcd into fileSystem
basic get
support hidden node
add hidden test
refactor
node.go: fix defer and add doc
gofmt
Merge pull request #4 from fengjingchao/fileSystem

node.go: fix defer and add doc
change filepath to path and fix path namespace collision
Merge pull request #5 from fengjingchao/fileSystem

change filepath to path and fix path namespace collision
init file system spec
event.go: remove extra logic in addEvent()
update file
change key_path to keyPath
support testandset
more testandset test cases
support recursive get
refine doc
Merge pull request #6 from fengjingchao/fileSystem

refine doc