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.
Instrument/log DalliStore#clear

Without instrumenting, DalliStore#clear will not log flush actions. This tiny patch makes it consistent with the other actions and fixes logging (so that I don’t have to lose another day of my life to unlogged memcached events...)
Merge pull request #259 from edward/patch-1

Instrument/log DalliStore#clear
Provide with_lock helper in rack session store
Add tests for dalli rack session
Merge pull request #264 from alup/master

Add with_lock helper in rack session store (like in rack lib)
Prepare for 2.2.0 release
Fix error handler constant lookup