0.3.5-beta

This release fixes a bug that occurs when compositing images across the year divide where there are no image dates from the first year in an annual set (no 2009 dates in the 2009-2010 set, for example) - it would not create a composite in this case. It also adds the ability to define how to label the annual composites when crossing the year divide - either pre- or post- divide year. Previously, it was hardwired to label with the pre-divide year.