Set Git attributes for source files to keep LF line endings.

* .gitattributes (*.h, *.c, *.rb): Set EOL to LF.

Author: gemmaro

.gitattributes

@@ -1,7 +1,7 @@
 *.txt		text
-*.h         text
-*.c         text
-*.rb        text
+*.h         text eol=lf
+*.c         text eol=lf
+*.rb        text eol=lf
 *.yml       text
 *.vcproj	text eol=crlf
-*.sh		text eol=lf
+*.sh		text eol=lf