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
recursive watch
Merge branch 'fileSystem' of https://github.com/xiangli-cmu/etcd into fileSystem
update operation
update test
support create directory
support watch delete
add comments; event.go: add Create and Update const
remove todo
add acl doc
Merge branch 'fileSystem' of github.com:xiangli-cmu/etcd into fileSystem
modify name. simplify test case.
Merge pull request #7 from fengjingchao/fileSystem

add acl doc after merge