GEOMESA-249 getUniqueGeohashSubstringsInPolygon fails if you don't specify a maximum number of keys less than Int.MaxValue

Updated the unit tests to reproduce this error, and tweaked the routine to compute the expected result.
GEOMESA-247 BoundingBox error viewing coverage in layer preview
GEOMESA-72,224,225 Geomesa-tools

Refactor of Ingest command to support CSV/TSV files with WKT geometries.
Tools for export, explain, create, delete, and list features
GEOMESA-257 removing test servlet and mapping
GEOMESA-261 securing geomesa pages, fixing order of menu
GEOMESA-262 Text printed after command line export should specify correct path of exported file

    Corrected output text and also switched most println's to logger.
GEOMESA-213 GeoHash corner cases

* GeoHashes now must be inside the rectangle [-180.0, 180.0] by [-90.0, 90.0].
* The top and right corners of the world rectangle are now 'nudged' back in rather than wrapping.
Merge branch 'accumulo1.5.x/1.x' of github.com:locationtech/geomesa into comments_only_wip_knn_search