Issue #1004: RPM package doesn't install on systems with Tomcat7
Created phenotips-tomcat6 and changed the default RPM to depend on versionless "tomcat"
Other changes:
- moved the webapp from /var/lib/tomcat/webapps to /var/lib/phenotips/webapp, registered now using a context file
- added a dependency on "bc" which was used in the postinstall scriptlet
- upgraded to rpm-maven-plugin 2.1-alpha-4 (and renamed "copyright" to "license" in the configuration, since this is the preferred name in alpha-4)