Removed loading of packages from Problem

README.md

 WOLF - Modular estimation framework for robotics based on factor graphs 
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-For installation guide and code documentation, please visit the [documentation website](http://mobile_robotics.pages.iri.upc-csic.es/wolf_projects/wolf_lib/wolf-doc-sphinx/).
+For installation guide and code documentation, please visit the [documentation website](http://www.iri.upc.edu/wolf).