Added "Integrating with an existing node app" section

(todo: check over for mistakes)
Added link to fileupload example

Totally missed that example before!
changed port numbers to be consistent with examples
fixed example after testing it out properly
added image share example
helloworld imports binaryjs consistent with other examples
Building 0.1.9
Add uglify-js v1 dependency
Merge pull request #47 from benfoxall/master

Instructions on usage with existing node apps
Merge pull request #48 from benfoxall/imageshare-example

Imageshare example
Merge pull request #49 from LiveMinutes/build-0.1.9

Building 0.1.9
Merge pull request #50 from LiveMinutes/fix-uglifyjs-dependency

Fix uglifyjs dependency
sync to binaryjs upstream