+ unicode example
Merge pull request #97 from snowyu/feature/unicodeChar

+ supports the unicode characters
Added Riceball LEE as a contributor.
Bumped 0.10.0.
Build for 0.10.0.
Merge branch 'master' of https://github.com/mcollina/levelgraph
* remove depreacted warning message on level-subkey.
Merge branch 'master' into feature/unicodeChar