yanglint FEATURE initial version of yanglint(1)

Source codes are mostly taken from libyang 1.0 and slightly modified for
libyang 2.0. A lot of functionality is still missing since it is not yet
provided by libyang 2.0
diff --git a/tools/lint/completion.h b/tools/lint/completion.h
new file mode 100644
index 0000000..953add2
--- /dev/null
+++ b/tools/lint/completion.h
@@ -0,0 +1,22 @@
+/**
+ * @file main.c
+ * @author Michal Vasko <mvasko@cesnet.cz>
+ * @brief libyang's yanglint tool auto completion header
+ *
+ * Copyright (c) 2015 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://opensource.org/licenses/BSD-3-Clause
+ */
+
+#ifndef COMPLETION_H_
+#define COMPLETION_H_
+
+#include "./linenoise/linenoise.h"
+
+void complete_cmd(const char *buf, const char *hint, linenoiseCompletions *lc);
+
+#endif /* COMPLETION_H_ */