update for chef 11  attrib compat
1.2.1
* update node[:sysctl] = blah to chef 11 node.set[:sysctl] = blah
* bust changelog out from README to its own file
* fix typo in example
* remove unused resource/write.rb
The /etc/sysctl.conf does not allow quoted values.
Merge pull request #4 from DonorsChoose/master

Syntax correction for /etc/sysctl.conf (values should not be quoted)
Release 2.0.0

Conflicts:
	CHANGELOG.md
	README.md
	metadata.rb
	providers/default.rb
remove quotes on templates
update testing