docs(readme): update docs
docs(readme): update docs

Signed-off-by: Will Soto <e88b744add47cc3da30186f5601865928acd804d@gmail.com>

willsoto/angular-chartist.js,willsoto/angular-chartist.js,paradox41/angular-chartist.js,demokracie21/angular-chartist.js,demokracie21/angular-chartist.js,paradox41/angular-chartist.js