D47crunch v1.0.0

Update version

D47crunch v0.5.1

Added support for single-point and two-point standardization of δ13C and δ18O and modified D47data.wg() for consistency.

D47crunch v0.3.2

New PyPI version (with requirements.txt)

D47crunch v0.3.1

First PyPI release

D47crunch v0.1

First release with no obvious bugs