reformat the submission to follow the alphabet order

PM2.5 Open Data Portal provides open data from the AirBox project, which is a low-cost PM2.5 sensing project. The data frequency is every 5 minute, and there have been more than 15,000 sensors deployed worldwide.

Removed dead links

Remove fullstop

Co-Authored-By: Sandro <sandro.jaeckel@gmail.com>

Updated Gitter URL

Co-Authored-By: James Brooks <james@alt-three.com>

Fix count.ly and IBM natural language understanding broken links, both links were moved
Remove an unneeded whitespace

remove dark sky

a previous version of this commit accidentally made the wrong change, that was a rookie mistake. sorry.

this commit adds the code::stats api (which is not very featureful but does add access to the user statistics)

Added UnixTime converter - free REST API

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