Update README.md

README.md

 # submeso-color
 
-Collocate submesoscale fronts to phytoplankton levels using satellite imagery
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+Collocate submesoscale fronts to phytoplankton levels using satellite imagery
+
+## Content
+
+- Download: Scripts for downloading data (SST and Chlorophyll)
+- lib: Reusable code. Scripts for defining databases
+- Compute: The actual code that does stuff. Each python script is accompaniedby a shell
+- Script: Various utility scripts
+
+
+## Requirement