fix Plugin Error

* fix "Plugin Error: undefined method `set_conf' for Hiki::Util:Module"
  when using {{recent(10)}}, {{toc}}, and etc.
remove unwanted encoding conversion.
add support for info.db conversion.
fix incorrectly removing entries when page's filename is ascii
fixed edit user attributes
Merge pull request #52 from hiki/fix-latest-edit-user

fixed edit user attributes
exchange revision params for history diff
Merge pull request #46 from murashin/master

add support for info.db conversion.
Merge pull request #53 from hiki/fix-history-diff-rubima

exchange revision params for history diff
update dependency
refine configuration of travis
update dependency
Merge branch 'master' into rubima