Integrates Tomcat Native and JSVC

I'm submitting this pull request just in case you are interested in the changes I've made. This pull request does the following:

* Adds a "build.sh" script for building the RPM in the same directory as the repo under "rpmbuild"
* Adds requirement for using a packaged Java distribution (e.g. java-1.7.0-oracle-devel or java-1.7.0-openjdk-devel)
* Integrates building the Tomcat Native library that ships with the Tomcat download
* Integrates building the JSVC binary that ships with the Tomcat download
* Reworks the init script to use JSVC
* Adds support for overriding JAVA_OPTS via /etc/sysconfig/tomcat