Ignore entire data folder

Previously only some of its content was ignored, so running

    python -m spacy.en.download all

after installing from a local repo would create unstaged changes.

.gitignore

@@ -29,10 +29,7 @@ spacy/orthography/*.cpp
 ext/murmurhash.cpp
 ext/sparsehash.cpp
 
-data/en/pos
+/spacy/data/
-data/en/ner
-data/en/lexemes
-data/en/strings
 
 _build/
 .env/