Finish create and show function, add edit function

Finish create function
Show the added wiki page successfully
Add edit function
Update index.html

Version 1.0 for dropbox viewer
Update dropbox.py

Version 1.0 for our controller
Merge pull request #46 from aiolos404/master

Finish create and show function, add edit function
Merge pull request #48 from grimur82/patch-2

Update index.html
Merge pull request #49 from grimur82/patch-3

Update dropbox.py