Updates to all of the components' submodules

-client   -> a25f7eef42d340327b0ed3a787742a751780c805
-database -> ee5e33dabb399f7b235c61c9217ab75f6b4241ae
-merger   -> a9d316e105c4f5969728d4b3d2552d5acbac8bda
-viewer   -> 793e7f8d85aa281cf3a836ed03d7c7fabdc250c7