toggle edge and value (Fix #69)
create barb with rb and html(Fix #68).
delete a pending
Create Prehtml::Sandbox#rb. (Fix #39, #40)
Impletement branch of barb. (Fix #76)
create show.barb. (Fix #36)
output option can be taken multiple target. (Fix #79)
Add feature to write inside existing file. (Fix #52)
Remove some pendings.
Add ignored file to .gitignore.
Add gemspec
Modify some descriptions of spec
Add some RDoc comments
Modify README.md
Modify Usage message
Modify version