update issue url

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
import box from https://github.com/fgrehm/vagrantboxes-gh-pages

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
add text filter to boxes list

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
move script to _layout

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
add tabs into top page

Signed-off-by: Hiroshi Miura <miurahr@linux.com>