Update README.md file for new config file attributes

Since the code has changed to add the mongodb configuration options
into the mongodb[:config] attribute, the documentation had to be
updated. This relates to issues #229 and #182
Replace old configuration files attributes to new mongodb[:config] notation

Since the code was refactored to use the mongodb[:config] attribute to
store configuration settings, setting the attributes in a wrapper
cookbook was not working. This commit replaces all references to the
new notation. See #182
Update documentation to reflect the logpath attribute to be a file

This is in line with the mongodb configuration documentation. A small
change was needed to create the log folder.
Adding .rubocop.yml and running auto correct
Merge #230 'master' from git://github.com/twom/chef-mongodb into 'master'
Conflicts:
	recipes/mongos.rb
typos
bump 0.15.0
configsrv -> configsrvs
support 1.8.7 for regex
Update README.md

updated instructions to be more clear for replica sets. the recipe used should be used instead of the default not in addition to
Merge pull request #241 from aciddj/patch-1

Update README.md