open layout file from controller
update open-layout spec
open any layout files using glob library
add spec for open-layout when same base name as the controller exists
open layout when same base name as the controller exists
add spec for open-layout when there is no such controller-specific layout
open layout when there is no such controller-specific layout
refactor open-layout command
update README
update CHANGELOG
Merge pull request #50 from hmatsuda/open-layout-command

Open layout command