Ensure line endings are handled by git

Checkout/commit native line endings, even if users don't have `core.autocrlf` set.

Author: zbeekman

.gitattributes

@@ -0,0 +1,31 @@
+# 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.
+*.c text
+*.h text
+*.f90 text
+*.F90 text
+*.md text
+*.txt text
+*.sh text
+*.cu text
+
+# Denote all files that are truly binary and should not be modified.
+*.mod binary
+*.o binary
+*.a binary
+*.so binary
+*.tar binary
+*.gz binary
+*.tgz binary
+
+# Prevent dev-ops files from making it into the release archives
+.gitattributes export-ignore
+.gitignore export-ignore
+codecov.yml export-ignore
+.github export-ignore
+
+# Perform substitutions when `git export`ing these files
+.VERSION export-subst