Merge pull request #233 from alevy/docs

Fixed Client#initialize comment.
logging in exist, delete, clear
Merge pull request #234 from kei-s/more-logging

logging in exist, delete, clear
Add support for URL connection strings.
Merge pull request #238 from glenngillen/uri-connection-strings

Add support for URL connection strings.
added "touch" support
removed unused options from Client#touch, added tests, updated history
Merge pull request #239 from uzzz/master

Touch support
Check for Railtie before loading [#242]
Update README with memcached installation on Ubuntu
Merge pull request #244 from pjg/patch-1

Update README with memcached installation on Ubuntu
UNIX sockets cleanup
Fix TOUCH command test.
encoding_aware? is deprecated in Rails 4
Merge pull request #255 from brianmario/encoding-check

String#encoding_aware? is deprecated in Rails 4
Show the warnings when running the tests
Remove unused variable warnings
Initialize instance variable in the initializer to avoid warnings
Remove ambiguous first argument warning
Merge pull request #258 from rafaelfranca/warnings_cleanup

Cleanup some warnings.