Metacells

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* Add inner fold factor computation for metacells quality control.
* Add deviant fold factor computation for metacells quality control.
* Add projection of query data onto an atlas.
* Self-adjusting pile sizes.
* Add convenience function for computing data for MCView.
* Better control over filtering using absolute fold factors.
* Fix edge case in computing noisy lonely genes.
* Additional outliers certificates.
* Stricter deviants detection policy

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* Switch to new project template.
* Fix some edge cases in the pipeline.
* Switch to using ``psutil`` for detecting system resources.
* Fix binary wheel issues.
* Give up on using travis-ci.

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* More robust graph partition.
* Allow forcing feature genes.
* Rename "project" to "convey" to prepare for addition of atlas projection functionality.

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* First published version.