Setup spec infrastructure and a first test

Base class tests done (incl. parameter validation)

91 rspec tests. Covering all sub classes as well
Fixed Rakefile for TravisCI
Fix tests for 2.6.x
Exclude 1.9.3/2.6.14 from build matrix
Merge pull request #2 from dkerwin/feature/rspec_tests

Test coverage by rspec-puppet and puppetlabs_spec_helper integration
Update Travis CI configuration

* Added Ruby 2.0.0 to test matrix
* Updated Puppet versions for test matrix
Update copyright notice in README.md
Add Debian 7.0 (Wheezy) to list of supported distributions
Update to DSC 1.2
Fix spec after upgrade to DSC 1.2
Remove Ruby 2.0.0 from test matrix again
Update cassandra-env.sh template to latest version from Cassandra 1.2
Change gem source to https://rubygems.org
Update cassandra.yaml template to version from Cassandra 1.2

* Added additional parameters which are now available in the Cassandra configuration:
  ** start_native_transport
  ** start_rpc
  ** native_transport_port
  ** num_tokens
  ** internode_compression
  ** disk_failure_policy
* Default Partitioner is now org.apache.cassandra.dht.Murmur3Partitioner
* Added notice if initial_token is set. num_tokens (see vnodes) should be used now
* Added repository information for RedHat
Add parameter include_repo
Update Modulefile for Version 0.2.0
Fix name property in Modulefile
Update Travis CI build matrix
Exclude Ruby 1.9.*/Puppet 2.6.18 from build matrix