warn when changing puppet forge API URL

moving this from a debug-level to a warn-level message.
Merge pull request #232 from joshbronson/master

warn when changing puppet forge API URL
Fix version regex to match i.e. 1.99.15

fixes boxen/puppet-mysql#37
Merge pull request #233 from pschulz/patch-1

Fix version regex to match e.g. 1.99.15
Issue #233 Add to changelog
Merge branch 'master' into 1.0.x

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