Implementing MongoDB, fixing bugs

Using Express 2
* Didn't migrate to Express 3 for some syntax changes
* EX) Dynamic Helpers, helpers, error, etc.
Merge pull request #2 from mayukudo/master

Implementing MongoDB, fixing bugs
Fixed issue with dependencies.
Merge pull request #3 from nh0815/master

Fixed issue with dependencies.
Change in CSS, README, and lib/index

Minor changes
Merge pull request #4 from mayukudo/master

Change in CSS, README, and lib/index