Add mongoose
Add mongo models

Add models for User, Room and Idea.
Clean up mongooose
Setup auto compiling with gulp.
Add npm-debug.log to gitignore.
Clean up mongoose
Move db to separate module
Export mongoose.
Remove server/db.js.
Add .DS_Store to gitignore.
Code cleanup and fix gulp task.
Merge pull request #24 from brettdewoody/mongoose

Setup mongoose connection and models.