Merge pull request #3 from winnietong/develop

Develop
saving drawing to db
Merge branch 'canvas' of github.com:winnietong/Draw-With-Me into canvas
Merge branch 'canvas' of github.com:winnietong/Draw-With-Me into canvas
Merge branch 'develop' of github.com:winnietong/Draw-With-Me into canvas
cleaning up canvas js
Merge branch 'canvas' of github.com:winnietong/Draw-With-Me into canvas
download image with filename
Merge pull request #6 from winnietong/canvas

Canvas