Adding --stats option to CeSymmMain

This allows the statistics output to be saved to a
file directly, rather than redirecting the stdout.

Also renamed --quiet to --nostats to be more consistent.
Updating maven plugins and SCM
Handle ~ in --pdbfilepath option
Adding release plugin to pom.xml
[maven-release-plugin] prepare release symmetry-tools-1.0.0
[maven-release-plugin] prepare for next development iteration