Add basic .gitattributes to repo

.gitattributes

@@ -0,0 +1,20 @@
+# Basics
+# ======
+*           text=auto
+
+# Source files
+# ============
+*.pxd       text diff=python
+*.py        text diff=python
+*.py3       text diff=python
+*.pyw       text diff=python
+*.pyx       text diff=python
+
+# Binary files
+# ============
+*.db        binary
+*.p         binary
+*.pkl       binary
+*.pyc       binary
+*.pyd       binary
+*.pyo       binary