Add site-setting menu.
Merge pull request #116 from mzkrelx/site-setting-menu

[#64324116] Add site-setting menu.
Add site setting view
Fix words
Merge pull request #120 from mzkrelx/site-setting-view

[#64324136] Add site setting view
Develop saving site setting.

* First inserting by sql.
* Updating from site setting view.
* Flash messaging when update successed.
Merge pull request #122 from mzkrelx/save-site-setting

[#64324148] Develop saving site setting.
Show footer html
Merge pull request #123 from mzkrelx/show-footer

[#64324166] Show footer html
Merge pull request #125 from mzkrelx/footer-customize

[#64324148] Footer customize