#33 GIBS-619 Fixed time detection for cases where period is specified
#33 GIBS-619 Corrected MRF archetype log message
Merge branch 'master' of https://github.com/nasa-gibs/onearth into develop
#34 GIBS-673 Added pypng build dependency
#34 GIBS-673 Created empty tile generation tool
#34 GIBS-673 Added oe_generate_empty_tile.py to RPM install
#34 GIBS-673 Use the first entry with nodata="true" for empty tile color
#34 GIBS-673 Kick off empty tile generation from oe_configure_layer
#34 GIBS-673 Cleanup and small fixes to empty tile gen from layer config
#34 GIBS-673 Added alpha channel to empty tile
#35 GIBS-598 XML cache config is now created during layer configuration
#35 GIBS-598 Changed TWMS_Cache tag to Layer
#35 GIBS-598 Added new fields to cache XML and cleaned up structure
#35 GIBS-598 Updated oe_create_cache_config binary and OnEarth versions