In-process commit.  Refactoring for speed.

Adding data structures, moving to pass-by-ref
approach, making output write to file rather than
hold in memory.
Compiling but getting dload error
Modified main R function to deal with disk-write
Refactored to write to disk, added variable lamda_ex
Working with external forcing
Fixed import for spatstat
Added sonoma data
Randomizing run order for better time predictions
Randomize run order update