Normalize all line endings

.gitattributes

+# Set the default behavior, in case people don't have core.autocrlf set.
+* text=auto
+
+# Explicitly declare text files you want to always be normalized and converted
+# to native line endings on checkout.
+*.cpp text
+*.h text
+*.txt text
+*.md text
+*.json text
+*.cmake text
+*.svg text
+*.dot text
+*.yml text
+*.in text
+*.sh text
+*.autopkg text
+Dockerfile text
+
+# Denote all files that are truly binary and should not be modified.
+*.png binary
+*.jpg binary