edited README
Merge pull request #2 from akiomik/develop

first push
edited README
updated README
updated README
fixed relative directory bug
Merge pull request #3 from akiomik/hotfix/issue-3
set diff color
added new screenshot
Merge pull request #6 from akiomik/feature/issue-4

set gutter color
inhibit sign column flicker
Merge pull request #8 from akiomik/feature/issue-7

inhibit sign column flicker