Database#add and #remove return the count of affected records
Add clean, test and yard tasks
Add test-unit-notify
Database#create -> #init
Remove Pages.title and add Pages.book_title and Pages.page_title
[BUG FIX]Groonga::Hash does not have #length method
Remove unused variables
Next fast
Reuse HighLine::Style object
Make variable name 're' more meaningful
Rename option 'overwrite' for add to 'update'
Fix typos: hilight -> highlihgt
Remove unsupported option 'xml' for search
Add 'color' option to search command
[BUG FIX]Fix path of exittime file
Delete exittime file when init with --force option