2014-08-12  Gerrit Holl  <gerrit.holl@utoronto.ca>:

	* pyatmlab-0-0-39

	* pyatmlab/collocations.py(CollocationDescriber):

	- When extending common grid, do not insist on constant z-grid

	- Clarify smoothing rules

	- WARNING NEEDS WORK BEFORE APPLYING TO NON-PEARL DATA

	* pyatmlab/dataset.py:

	(Dataset):

	- Clarified on risks of misusing start_date

	(MultiFileDataset):

	- When using a shelve copy, don't bother on read only.  Might only
	  mean things go wrong later.  Stored data lost anyway.

	* pyatmlab/datasets.py:

	(TansoFTSv10x):

	- Add comment clarifying pressure level mayhem

	- When getting z, merge pressure grids that T/q and CH4 are on, so I
	  can calculate z-levels for CH4-retrieval.  Needs a little bit of
	  extrapolation.

	* pyatmlab/physics.py(p2z_hydrostatic):

	- Restore test for p[0] < p0 < p[-1] as per Patrick discussion