Increased net.core.somaxconn to prevent unintentional truncation of
syn_backlog.
Removed sysctl specific settings because they are handled by the Riak
cookbook since version 2.4.2.
Add support for multiple operating systems (Ubuntu and CentOS).
Add environmental variable documentation to README.
Merge branch 'feature/ubuntu' into develop
Added a CHANGELOG.
Merge branch 'release/0.2.0'