Add grep enconding option to Editor Integration
Fixed a bug that don't contain line before match.
Print separate line when context option enable.
Merge pull request #20 from shiena/patch/unite_encoding

Add grep enconding option to Editor Integration
Implemented g option.
Changed args check for g option.
Formated printing with using g option.
Bumped version to 1.4.0.
Add output encode option (-o)

Usage:
  ShiftJIS:  pt -o sjis pattern
  EUCJP:     pt -o euc  pattern
  ISO2022JP: pt -o jis  pattern