Alter gitignore

Allow the out folder packages, required for demo
Add the packages for the example

pub install
cd example
dart build.dart
cd out
rm packages
mv ../../packages .
cd packages
rm jsonp
each 'mkdir $1.cpy; cp -r $1/* $1.cpy; rm $1; mv $1.cpy $1;' *(@)
ln -s ../../../lib jsonp