Initial commit to new fork.
FlowDirection now extends Op1; some formatting changes
Fixed some spelling.
Added some documentation.
Clarified the maps in the getNeighbors function
Made some comments parseable for ScalaDocs; removed unnecessary blank lines/white space.
Improvements towards new datasource remoting.

This commit includes upgrading to akka 2.2.1, updates to the dev subproject
to run under akka 2.2.1, as well as new changes to the Server actor infrastructure,
a new RemoteOperation wrapper operation, and a distribute() method on DataSourceLike.
Merge pull request #590 from wzjchen/hydrology

Hydrology - Flow Direction
Update FlowDirectionSpec.scala

Removed blank spaces.
Fix command line argument for dev project port.
Mark Cache as Serializable.
Upgrade Server cluster code and dev project for akka 2.2.1.
Fix to zonal.summary.Mean. Closes #587
Merge pull request #595 from lossyrob/fix/zonalmean

Fix to zonal.summary.Mean. Closes #587
Merge pull request #593 from joshmarcus/topic/ds_remoting

Improvements towards new datasource remoting.
Merged in upstream, fixed tests.