accucor 0.3.1

• Minor fix to package documentation (@lparsons)

v0.3.0

Release version 0.3.0 to CRAN.

• Recognize adductName column from El-Maven as a non-sample column
• Export lower level functions for isotope correction: carbon_isotope_correction, deuterium_isotope_correction, and nitrogen_isotope_correction

Release version 0.2.4 to CRAN

First CRAN release