Draft API for morphological analysis class

spacy/tokens/morphanalysis.pyx

@@ -0,0 +1,57 @@
+cdef class Morphanalysis:
+    """Control access to morphological features for a token."""
+    def __init__(self, Vocab vocab, features=None):
+        pass
+
+    @classmethod
+    def from_id(self, Vocab vocab, hash_t key):
+        pass
+
+    def __contains__(self, feature):
+        pass
+
+    def __iter__(self):
+        pass
+
+    def __len__(self):
+        pass
+
+    def __str__(self):
+        pass
+
+    def __repr__(self):
+        pass
+
+    def __hash__(self):
+        pass
+
+    @property
+    def is_base_form(self):
+        pass
+
+    @property
+    def pos(self):
+        pass
+
+    @property
+    def pos_(self):
+        pass
+
+    @property
+    def id(self):
+        pass
+
+    def get(self, name):
+        pass
+
+    def set(self, name, value):
+        pass
+
+    def add(self, feature):
+        pass
+
+    def remove(self, feature):
+        pass
+
+    def to_json(self):
+        pass