0.2.5 Changelog

PR Merged: @lavender22 updated the spider diagram example to add a link to the normalisation example (which lists different reservoirs you can normalise to).
Added an 'Importing Data' section to the docs Getting Started page.
Disabled automatic extension loading (e.g. for pyrolite_meltsutil) to avoid bugs during version mismatches.

`pyrolite.comp`

Updated the pyrolite.comp.pyrocomp dataframe accessor API to include
reference to compositional data log transform functions within pyrolite.comp.codata

Added support for spider plot index ordering added with the keyword index_order (#30)
Added support for color indexing in pyrolite.plot.color using
pandas.Series, and also for list-like arrays of categories
Added a workaround for referring to axes positions where the projection is changed
to a ternary projection (displacing the original axis), but the reference to the
original axes object (now booted from fig.axes/fig.orderedaxes) is
subsequently used.
Updated pyrolite.plot.color.process_color processing of auxillary
color keyword arguments (fixing a bug for color arguments in pyrolite.plot.stem)
Added support for a color_mappings keyword argument for mapping
categorical variables to specific colors.
Updated the effect of relim keyword argument of
pyrolite.plot.density.density to remove the scaling (it will no longer
log-scale the axes, just the grid/histogram bins).
Updated pyrolite.plot.ternary.grid.Grid to accept an x-y tuple to specify
numbers of bins in each direction within a grid (e.g. bins=(20, 40))
Updated the grids used in some of the pyrolite.plot.density.density
methods to be edges, lining up the arrays such that shading parameters
will work as expected (e.g. shading='gouraud')

Added sorting function pyrolite.geochem.ind.by_imcompatibility
for incompatible element sorting (based on BCC/PM relative abundances).

Moved pyrolite.util.general.check_perl out of pyrolite into pyrolite_meltsutil