sdss/marvin: Marvin Beta 2.1.3

This patch release Added: Issue #204: added elpetro_absmag colours to mangaSampleDB models. Issue #253: Plotting tutorial. Issue #223: Easy multi-panel map plotting (with correctly placed colorbars). Issue #232 and Issue #251: Uses matplotlib style sheets context managers for plotting (map, spectrum, and BPT) and restores previous defaults before methods finish. Issue #189: Map plotting accepts user-defined value, ivar, and/or mask (including BPT masks). Issue #252: Quantile clipping for properties other than velocity, sigma, or flux in web. Added utils.plot.map doc page. Added tools.map doc page. Changed: Issue #243: inverted __getitem__ behaviour for Cube/Maps/ModelCube and fixed tests. Modified Flask Profiler File to always point to $MARVIN_DIR/flask_profiler.sql Issue #241: Moved map plotting methods from tools/map to utils/plot/map Issue #229 and Issue #231: Switch to new gray/hatching scheme (in tools and web): gray: spaxels with NOCOV. hatched: spaxels with bad data (UNRELIABLE and DONOTUSE) or S/N below some minimum value. colored: good data. Issue #238: Move plot defaults to datamodel (i.e., bitmasks, colormaps, percentile clips, symmetric, minimum SNR). Issue #206: SNR minimum to None (effectively 0) for velocity maps so that they aren't hatched near the zero velocity contour. Simplified default colormap name to "linearlab." Decreased map plot title font size in web so that it does not run onto second line and overlap plot. Fixed: Interactive prompt for username in sdss_access now works for Python 3. Fixed #195: The data file for the default colormap for Map.plot() ("linear_Lab") is now included in pip version of Marvin and does not throw invalid FileNotFoundError if the data file is missing. Fixed #143: prevents access mode to go in to remote if filename is present. Fixed #213: shortcuts are now only applied on full words, to avoid blind replacements. Fixed #206: no longer masks spaxels close to zero velocity contour in web and tools map plots Fixed #229: corrects web bitmask parsing for map plots Fixed #231: hatch regions within IFU but without data in map plots Fixed #255: Lean tutorial code cells did not work with the ipython directive, so they now use the python directive. Highcharts draggable legend cdn