2014-04-08  Gerrit Holl  <gerrit.holl@utoronto.ca>:

	* pyatmlab-0-0-20

	* pyatmlab/collocations.py:

	- Add method find_granule_pairs that will yield all pairs of granules
	with potential time-overlap

	* pyatmlab/dataset{,s}.py:

	- Rename granules_for_period -> find_granules

	- Pass read through functools.lru_cache, do actual work in _read

	(MultiFileDataset):

	- pass time-hints as dict not sequence

	* pyatmlab/local/datasets.py:

	- Use granule_cache_file