Text.Table: Support powerful width feature.
Text.Table: Support powerful joint/border feature.
Text.Table: Add tests.
Text.Table: Update document.
Merge pull request #210 from kamichidu/Text.Table

Add rich joint/border features to Text.Table
Web.JSON: Speed tuning

`substitute(json, '\n', '', 'g')` is toooo slow when json is large.
`join(split(json, "\n"), '')` is faster than `substitute(json, '\n', '', 'g')`.
Merge pull request #211 from kamichidu/tuning

Tune Web.JSON for speed.
Data.List: add permutations
Data.List: fix typo
Data.List: delete unneccesary variable
Data.List: doc: add description about string in permutations
Data.List: spec: separate test case in permutations
Data.List: delete unnecessary calculation
Merge pull request #212 from aomoriringo/master

Data.List: add permutations