GEOMESA-444 Implement TimeSnap class
GEOMESA-461 Allow configurable record table splits

* TableSplitter interface can be defined by users
* getSplits method returns the desired splits for the records table
* Added configuration of splitter in the SimpleFeatureType spec
GEOMESA-477 Optimize imports and update copyright

Updated copyrights to 2014.  Optimized imports for
all source files.
GEOMESA-480 Add release repository to distributionManagement