fix typo wrt single and double quoted strings
Merge pull request #227 from tallakt/tallakt_proofread_v0.13

fix typo wrt single and double quoted strings
Translate into japanese(1 Interactive Elixir)
Translate into japanese(2 Basic types)
Translate into japanese(3 Basic operators)
Translate into japanese(4 Pattern matching)
Translate into japanese(5 case, cond and if)