Update README.md

Author: brendancol

README.md

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 # pypeline
 Easy-to-use, easy-to-inspect function pipelines for Python
+
+# Currently under develop.  This is simply a placeholder repository.
+
+# Value Propositions
+- construct a pipeline for executing arbitrary Python function using local or distributed schedulers
+- easily start or stop execution of the pipeline based on named stages
+- easily start or stop execution based on arbitrary condition
+- visualize pipeline execution dynamically in a Jupyter notebook or web browswer using Bokeh (super simple version of dask diagnostics dashboard)
+-