Made it conform to central requirements

Added parent link to sonatype OSS parent pom to make it set up the
requirements more easily.

Changed the groupId and artifactId to net.trajano conventions.  This
should be changed to org.easycassandra:EasyCassandra by @otaviojava

Also added SCM defnition.  This also needs to be changed to use
@otaviojava github repository.

Fixes #38
Ignore findbugs and Javadoc Lint on JDK8
[maven-release-plugin] prepare release easy-cassandra-2.0.4