Fixed this to fix a bug in SPARROW where the last value written into a D...

...BF file would not map with Tom's multi-dbf-datastore.  Looking at this, I believe this was always an issue but was never noticed.

* Added a source code attachment for the build.
https://github.com/geotools/geotools/blob/master/modules/plugin/shapefile/src/main/java/org/geotools/data/shapefile/dbf/IndexedDbaseFileReader.java#L105 with the memory mapped buffer code ripped out