fix #237 add flag for using the v3 forge api

librarian-puppet install --use-v3-api adds support for downloading modules from a custom
Puppet forge using the v3 api
add --use-v1-api install flag

The v1 API is still default but should be changed to false in future
versions. Specify --no-use-v1-api to use the new v3 API with a custom
Puppet Forge
docs on how to specify forge API version
Fix tests now that puppetlabs-stdlib only includes metadata.json
Fix issue #239 - add access_token correctly to url's which are already having query parameters
Merge pull request #238 from jhaals/jhaals/custom_v3

fix #237 add install flag for using the v3 forge api
Update changelog
Merge branch 'master' into 1.0.x

Conflicts:
	lib/librarian/puppet/source/forge.rb