GEOMESA 306, 305, 296, 295

* Split off ingest from Tools class, to ensure case class does not reach max size.
* Updated geomesa bash script to properly pipe to ingest, and not split inputs containing spaces (G-306).
* Allowed User to optionally hash feature IDs depending.
* Added optional arguments for: maxShard, auths, visibilities, and indexSchemaformat
* Made changes to how successes vs failures are counted and logged in SVIngest
* Made checks to ensure maxShard and indexschemaformat could not be both set.
* Made Utils.scala to contain common code.
* Updated Readme to be current.
GEOMESA-302 Export overwrites files without prompting

Exported files are now guaranteed to have a unique filename through using File.createTempFile,
which appends a unique id to each file name. The current DateTime is also appended
to make it easier to identify exported files.
switching file name uniqueness based on comments
updating README and warning message on delete
fixing geomesa shell wrapper
lost some code in the rebase
removing unnecessary imports