2014-05-02  Gerrit Holl  <gerrit.holl@utoronto.ca>:

	* pyatmlab-0-0-27

	* pyatmlab/collocations.py:

	(CollocationDescriber.compare_profile):

	- Started work on this method.  Unfinished.

	* pyatmlab/dataset.py:

	- Added field 'aliases'

	- Added class 'ProfileDataset' as mixin for any data-specific methods

	* pyatmlab/datasets.py:

	(TansoFTS):

	- Also derive from ProfileDataset
	- Add aliase
	- Implement get_z (work in progress, DRY!)

	(AceFTS):

	- Add aliases and implement get_z (trivial here)