Update README.md

Author: abtully

README.md

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 # pyton-tutorial-mpl-plotly
-Introduction to python analysis using either Matplotlib or Plotly for graphing. Written for UBC Engineering Physics 2nd Year Lab. Initially written in Google Colab by Tim Child and Alexandra Tully.
+Co-authors: Tim Child, Alexandra Tully
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+Introduction to python analysis using either Matplotlib or Plotly for graphing. Written for UBC Engineering Physics 2nd Year Lab.
 
 Specifically for use with Google Colab (a Jupyter notebook equivalent), although mostly applicable to any Python environment.