move layer files into separate directory
fix intermixing of tabs / spaces.
Use relative paths to pull out .lyr files instead of a hard-coded one.
use arcpy's projection engine instead of pyproj to cut down on dependencies.
conditionally import pyproj as it's likely faster for large datasets due to its handling native numpy arrays directly; but use internal reprojection if pyproj isn't available.
Merge pull request #1 from scw/master

Use internal reprojection if pyproj is unavailable, other steps toward generalization