add memcache recipe
add a template for memcached.conf
Merge branch 'master' of https://github.com/openminds/sneakers into memcache

* 'master' of https://github.com/openminds/sneakers:
  Fixes indentation
  fixed pinning for dotdeb

Conflicts:
	chef/cookbooks/apache/files/default/dotdeb_php_pinning
add attributes to the memcached configuration file
add tests for memcached
fix some newlines at the end of files
add some documentation for memcached support
Removes whitespace in extra's tests
Merge branch 'Dextro-memcache'