Fix proxy_stack ambiguous definition warnings with clang
Update NEWS.rst
Merge pull request #89 from steinwurf/fix-proxy-stack-warning

Fix proxy stack warning
Starting modifying the partial storage layer
Update README.rst
Working on the partial symbol storage
Finished unit test for the partial shallow symbol storage
Updating news
partial mutable shallow storage supported
Using the partial_mutable_shallow_storage_layers in the shallow stacks & Updated news
Merge branch 'master' into update-symbol-storage
Fixing todo
Remove todo
Merge pull request #90 from steinwurf/update-symbol-storage

Update symbol storage
Merge master