add seq num to version; change header names; multi-param support

src/include/version.hpp

@@ -0,0 +1,9 @@
+#pragma once
+
+#ifndef UI_EXTENSION_SEQ_NUM
+#error "UI_EXTENSION_SEQ_NUM must be defined"
+#endif
+#ifndef UI_EXTENSION_GIT_SHA
+#error "UI_EXTENSION_GIT_SHA must be defined"
+#endif
+#define UI_EXTENSION_VERSION UI_EXTENSION_SEQ_NUM "-" UI_EXTENSION_GIT_SHA