Actualización

vendor/doctrine/orm/docs/README.md

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+# Doctrine ORM Documentation
+
+## How to Generate:
+Using Ubuntu 14.04 LTS:
+
+1. Run ./bin/install-dependencies.sh
+2. Run ./bin/generate-docs.sh
+
+It will generate the documentation into the build directory of the checkout.
+
+
+## Theme issues
+
+If you get a "Theme error", check if the `en/_theme` subdirectory is empty,
+in which case you will need to run:
+
+1. git submodule init
+2. git submodule update