Update README.md

just how i understand this resources...
Merge pull request #4 from aabes/master

just how i understand this resources...

excellent description :)
Change deprecated Gemfile source `:rubygems` to `https://rubygems.org`
Shef extensions have moved in 11.x, add compatible require
Allow rewinding recipe_name
Merge pull request #9 from pdf/rewind_recipe_name

Allow rewinding recipe_name
Merge pull request #8 from pdf/chef_11_compat

Shef extensions have moved in 11.x, add compatible require
Merge pull request #7 from pdf/rubygems_deprecation

Change deprecated Gemfile source `:rubygems` to `https://rubygems.org`
bump version for 0.0.6 release
Implement `unwind` method. Closes #11

This allows resources to be deleted. It is super useful
if you have a resource that can not be modified without
adding more behavior, instead of changing the current behavior.

An example of where it is very useful is redefining notifications.
Merge pull request #12 from yipit-cookbooks/unwind

Implement `unwind` method. Closes #11
bump version for release
Bugfix for off-by-1 error in ResourceCollection#delete

This fix may be temporary, since a new idea for how to implement
ResourceCollection#delete popped up.

Andrew Gross (@awgross) helped me find, debug, and write this patch,
and he has a nice idea of how `unwind` should be implemented.

His idea is that we should not remove the resource from ResourceCollection,
because it may have unknown side effects (as it had and thus the bugfix),
and instead we should replace the resource with a fake resource,
a no operation (noop) valid resource, that when triggered, does nothing.

We need to investigate that idea, but it sound great and more error-prone.
Merge pull request #13 from yipit-cookbooks/bugfix-unwind

Bugfix for off-by-1 error in ResourceCollection#delete
release 0.0.8
Allow using rewind in providers
Return resource in rewind method