DAVILA 0.3 -- Now works without a complete customization file.

Changes made to the Entity.pde file include:
        - initialzing the annotation variable with a default value
        - adding an exception handler to colorCode to assign a slate grey color in case of a NullPointerException.

A dummy customization file was added to the data folder, "data/testBlank.csv", for people who do not want to use the example customization file.

DAVILA.pde was modified to include a (commented out) line for using the new customization file.

README.txt was updated to reflect these changes.