A lot of changes

Remove unused constructor of messages::Message
Fixed LimitedQueueSnapshot _-prefixes
Changed LimitedQueueSnapshot's usage of int to std::size_t
ColorScheme is no longer a singleton
Created a "BaseWidget" class which is pretty much a QWidget except it
has a reference of ColorScheme since most widgets will need a reference
to the style they should use.
BaseWidget can be implemented either with a BaseWidget parent (which
will copy the ColorScheme reference from the parent) or with a
normal QWidget parent and an explicit ColorScheme reference.
Save main window geometry on close
Fix font changing in the Settings Dialog
Update settings library version

src/messagefactory.cpp

@@ -1,6 +1,20 @@
-#include "messagefactory.hpp"
-
-MessageFactory::MessageFactory()
-{
-
-}
+#include "messagefactory.hpp"
+
+namespace chatterino {
+
+MessageFactory::MessageFactory(Resources &_resources, EmoteManager &_emoteManager,
+                               WindowManager &_windowManager)
+    : resources(_resources)
+    , emoteManager(_emoteManager)
+    , windowManager(_windowManager)
+{
+}
+
+messages::SharedMessage MessageFactory::buildMessage(Communi::IrcPrivateMessage *message,
+                                                     Channel &channel,
+                                                     const messages::MessageParseArgs &args)
+{
+    return nullptr;
+}
+
+}  // namespace chatterino