Convert DOS (CRLF) source files to Unix (LF) line endings

Excluded `examples/pybullet/gym/pybullet_data/` which has many (3000+)
CRLF data files (obj, mtl, urdf), and `docs/pybullet_quickstart_guide`
which has generated .js and .htm files with CRLF line endings too.

src/BulletSoftBody/premake4.lua

@@ -1,14 +1,14 @@
-	project "BulletSoftBody"
-		
-	kind "StaticLib"
-	
-	includedirs {
-		"..",
-	}
-    if os.is("Linux") then
-        buildoptions{"-fPIC"}
-    end
-	files {
-		"**.cpp",
-		"**.h"
+	project "BulletSoftBody"
+		
+	kind "StaticLib"
+	
+	includedirs {
+		"..",
+	}
+    if os.is("Linux") then
+        buildoptions{"-fPIC"}
+    end
+	files {
+		"**.cpp",
+		"**.h"
 	}