Added some gimmicks

Hello, I have modified mdwiki 0.6 branch to use our wiki page.

might be useful some gimmicks, I think..


added gimmicks

- solidopinion (as some page doesn't load discuss, I use solidopinion)
- filedate (show modified date of MD file)
- remark (elliminated remark grammar strings in MD file)

added module

- security.php (selected pages are require password | IP or not shown in web browser)

modified

- marked module to show mathjax correctly

changed

- as hash(#) is used many embbed applications (e.g. discuss), url delimeter changed from hash(#) to search(?)

experiment

- recent module and gimmick