Json support

Add Json support to json_encode (JsonSerializable)

0.1.3

Merge branch 'master' of https://github.com/susautw/susautw-type

0.1.2

0.1.1/0.1.2

• Stupid consequences of the author
• No change
• fix some readme and remove developing files

0.1.1

Remove .idea

0.1.0

Readme fix