(doc) readme updates
(doc) readme updates

 - Update module description.
- Add why chocolatey versus the built-in provider.
- Update affects section
- update usage section
- Update reference section
- formatting

korytkoBT/puppet-chocolatey,9bryan/puppet-chocolatey,ThoughtCrhyme/puppetlabs-chocolatey,idoru78/puppet-chocolatey,korytkoBT/puppet-chocolatey,rismoney/puppet-chocolatey,cregev/puppet-chocolatey,maxgaulhofer/puppet-chocolatey,9bryan/puppet-chocolatey,chocolatey/puppet-chocolatey,idoru78/puppet-chocolatey,rismoney/puppet-chocolatey,ThoughtCrhyme/puppetlabs-chocolatey,maxgaulhofer/puppet-chocolatey,ferventcoder/puppet-chocolatey,krutisfood/puppet-chocolatey,cregev/puppet-chocolatey,chocolatey/puppet-chocolatey,ferventcoder/puppet-chocolatey