GEOMESA-241 refactoring geo pages for new table layouts, adding attribute index page
GEOMESA-250 ExplainQuery can be cut short.

There seem to be two problems:
* The variable 'cur' in CloseableIterator needs to be set upfront.
* Naming the 'bind' in CloseableIterator flatMap causes confusion between the compiler and the developer.
Merge branch 'accumulo1.5.x/1.x' into fcr_geomesa_tools
changing name of exported files to match csv export