Add namespace to the options.
Merge pull request #485 from petergoldstein/feature/add_namespace_to_documented_options

Add namespace to the options.
Allow read_multi to receive an empty array
Add namespace as local option
Fix typo
Clean up the .gitignore file, using the Github template as a guideline
Add an explicit to_i on the ttl value, as in Rails 4.2 this will often be an ActiveSupport::Duration value instead of a Fixnum.
Merge pull request #493 from petergoldstein/feature/gitignore_cleanup

Clean up the .gitignore file, using the Github template as a guideline
Merge pull request #494 from petergoldstein/feature/explicit_to_i_on_ttl

Add an explicit to_i on the ttl value
support read_multi and fetch_multi with namespace
Merge pull request #492 from alaibe/master

Add namespace as local option
Implicit block call instead explicit call, faster code.
Merge pull request #495 from glaucocustodio/master

Implicit block call instead explicit call, faster code.
Use hash.each_key instead of hash.keys.each

each_key is faster that keys.each
Merge pull request #496 from jastix/patch-1

Use hash.each_key instead of hash.keys.each
Update README.md

(my confusion arose from the 'as normal' part of the line which I thought could have meant that it did not use the pool and acted as it normally does without connection pool....)
Merge pull request #498 from ryan2johnson9/patch-1

Update README.md
Update kgio URL, per Eric's request
Support sending `stats settings` command.
Merge pull request #500 from memcachier/master

Support sending `stats settings` command.