Add a .gitattributes file

This will let git normalize line endings automatically on commit and
checkout. In the repository all files will have LF line endings
and on checkout everybody gets their native (platform-dependent) line
endings.

Author: PhilippWendler

.gitattributes

@@ -0,0 +1,17 @@
+# Enable git's auto-detection of text files and enable normalization of line endings
+* text=auto
+# Force certain file types to be always considered as text with normalized line endings
+*.c text
+*.h text
+*.i text
+*.java text
+*.md text
+*.py text
+*.set text
+*.txt text
+*.yml text
+Makefile text
+Makefile.* text
+# Prevent changes to certain large directories where it is not relevant now
+clauses/** !text
+c/Juliet_Test/Juliet_Test_Suite_v1.3_for_C_Cpp/** !text