GEOMESA 320, use apache commons csv

* replaced usage of javacsv with 1.0 release of apache commons csv in geomesa-tools
* updated test to ensure wkt still works with commons csv
* updated pom
WIP - Release 1.0 tarball

Running with mvn package -P assemble now generates a tarball under geomesa-assemble/target. Further instructions
are found in the GeoMesa tools README.
use our own license