Add support for C3 and C4 class instance types
Add support for C3 and C4 class instance types

This changeset allows application and tiler instances to be launched as
C3 and C4 class instance types.

azavea/nyc-trees,maurizi/nyc-trees,kdeloach/nyc-trees,kdeloach/nyc-trees,kdeloach/nyc-trees,maurizi/nyc-trees,kdeloach/nyc-trees,kdeloach/nyc-trees,azavea/nyc-trees,maurizi/nyc-trees,azavea/nyc-trees,azavea/nyc-trees,maurizi/nyc-trees,azavea/nyc-trees