v0.3.0

Various changes in response to many helpful comments from reviewers of our IJCK paper.

Added

• New extrapolated ignition type, where the maximum slope is extrapolated to the baseline
• Tests that the composition type is stored properly in the DataPoint
• species_conversion dictionary can be passed to the get_cantera_mole_fraction and get_cantera_mass_fraction functions to change the name of a species in the output string
• Jupyter Notebook examples of usage

Removed

• Removes elemental-composition as a synonym for atomic-composition

Fixed

• Fixes test_incorrect_doi_period_at_end docstring

Changed

• Conda builds are now noarch - one package for all Pythons!
• pip installs now require Python compatible with 3.5
• Appveyor runs a single job and no longer builds conda packages
• Remove journal from required fields in the reference