Upgrade to akka 2.2.0 final.

Closes #519.
Add and consolidate operations for resizing and rescaling rasters.

This checkin adds a Resize() operation for generating new rasters
with new extents and resolutions.  This is especially useful
when creating an image from an output raster (generated at the
resolution of your data) to a new extent and resolution specification.

It also adds a Rescale which will scale up or down the resolution of a
raster by a fixed percentage.

Resample() is now folded into Resize().
Merge pull request #523 from joshmarcus/topic/resize

Add and consolidate operations for resizing and rescaling rasters.
Merge pull request #521 from joshmarcus/topic/akka_upgrade

Upgrade to akka 2.2.0 final.
gt-loader now deals with args
Merge remote-tracking branch 'upstream/master' into gtloader/args
Fixed issue with try\catch block
Merge pull request #524 from lossyrob/gtloader/args

Gt-loader now handles ARGs.
GeoJSON reader properly parses feature and geometry collections.

This checkin also fleshes out the GeometryCollection implementation.
GeometryCollection is separated into a new file, some constructors
are added along with a JtsGeometryCollection implementation.
Merge pull request #528 from joshmarcus/topic/geojson_collections

GeoJSON reader properly parses feature and geometry collections.
Add col, row, and extent constructor for RasterExtent.
Merge pull request #529 from joshmarcus/topic/rasterextentapply

Add col, row, and extent constructor for RasterExtent.