v0.1.3

#237: Fixing the raster tiler so it can handle edges of large-format raster more stably.
#231: Adding SwapChannels augmentation to deal with imagery that has different band order.
#230: Fixing gdal install requirement and a bugfix for checking if models are already downloaded.

A couple of other little fixes here and there (debugging training; making solaris save model state_dicts for torch instead of the whole model; fixing model checkpointing...etc.)