GEOMESA-338,266 Scalding Ingest and Date Time fix

* fixed date time cut issue
* added scalding map reduce ingest for csv/tsv data
* allow for ingest without datetime column/information
* skip header is no longer supported
* added java default time zone flag to ingest command in bash script
* improved error logging messages
* fixed milliseconds epoch
GEOMESA-349, 324 Create TAR-ball for distributing GeoMesa & GeoMesa tools' script should be filtered resource

Added a new module, geomesa-assemble, to take care of assembling GeoMesa into a tarball.
Also added symlinks in an Ant job for each library to handle different versions for the future.
addressing comments and updating shell script wrapper logic for adding hadoop jars
updating README
changing packaging to pom
removing unnecessary extra line in csv/tsv export
updating text, geomesa shell wrapper to work with rebased changes