DOC: Updating citations
Merge pull request #347 from arokem/citation

DOC: Updating citations
DOC: Citations and news are updated in the website
Minor update
Small news update
Merge pull request #348 from Garyfallidis/website_update

Website update
Added api changes file
DOC: Corrected api_changes.rst
Relaxed denoising test
Merge pull request #349 from Garyfallidis/website_update

Added api changes file to track breaks of backwards compatibility