Dap

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* Python 3.3 is no longer supported. This is in line with
other similar projects (Numpy, Xarray, ...) and it preempts the
expected python 3.3 EOL in September 2017.

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*Release date: 2017-Mar-28*

* PyDAP client fixes
* Adds workaround to the client when making requests to older ESGF OPENDAP servers
* Fixes a bug where mechanicalsoup wouldn't its browser
* Adds handling for values of -NaN
* Overhauls URS authentication to use the requests library
* Sets a default charset when connecting to servers that do not
* Packaging fixes
* Moves gunicorn in to server_extras dependency list
* Adds test data to the release tarball
* Code base improvements
* Adds flake8 linting/checking to the code base
* Improves testing for client authentication
* Drops support for Python < 2.7
* Converts internal imports to be explicit relative
* Miscellaneous bug fixes
* Fixes bug in fix_slices() when `stop` > len
* Fixes unexpected flattening of sliced arrays (41)
* Fixes bug where attributes were not propagated to nested structures (75)

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*Release date: 2016-Dec-01*

* Adds some optimizations to the server for DAP sequences
* Rewrite of the client so that it's now able to stream real time data
* Simplifies the design of handlers, eliminating DAP-related details
(so that developers can focus only on the data parsing when creating
new handlers).
* Full test coverage and continuous integration
* Adds support for Python version 3.3 through 3.5
* Adds support for federated authentication through the Earth System
Grid Federation (ESGF) and NASA User Registration System (URS).
* Fixes HTML response to show all dimensions for BaseType variables

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*Release date: 14-Nov-2013*

* Final release done by Roberto De Almeida