Added mpl-measurements to the list (#217)

* Added mpl-measurements to the list

* Updated description

* Further improved description

Author: ubaldot

packages/mpl-measurements.yml

@@ -0,0 +1,9 @@
+name: mpl-measurements
+repo: ubaldot/mpl-measurements
+section: interactivity
+description: Interactive cursor-based measurement tool for Matplotlib plots (time, amplitude, differences, ...)
+site: https://matplotlib.org
+keywords: [measurements, scope]
+pypi_name: mpl-measurements
+conda_package: mpl-measurements
+conda_channel: conda-forge