Huge refactor

- Remove some underscore-prefixes
 - Start using this-> more
 - Remove a few of the singletons (We pass references to managers to
         things that need it now. Might not be much better, but for now
         it works. It also shows what places might be slightly wrong
         designed)

src/main.cpp

@@ -1,3 +1,4 @@
+#include "application.hpp"
 #include "channelmanager.hpp"
 #include "colorscheme.hpp"
 #include "emojis.hpp"
@@ -16,9 +17,6 @@
 #include <boost/signals2.hpp>
 #include <pajlada/settings/settingmanager.hpp>
 
-using namespace chatterino;
-using namespace chatterino::widgets;
-
 namespace {
 
 inline bool initSettings(bool portable)
@@ -68,28 +66,25 @@ int main(int argc, char *argv[])
     }
 
     chatterino::logging::init();
-    SettingsManager::getInstance().load();
-    Resources::load();
-    Emojis::loadEmojis();
-    EmoteManager::getInstance().loadGlobalEmotes();
+    chatterino::SettingsManager::getInstance().load();
+    chatterino::Emojis::loadEmojis();
 
-    ColorScheme::getInstance().init();
+    int ret = 0;
 
-    WindowManager::getInstance().load();
+    {
+        // Initialize application
+        chatterino::Application app;
 
-    MainWindow &w = WindowManager::getInstance().getMainWindow();
-    w.show();
+        // Start the application
+        ret = app.run(a);
 
-    IrcManager::getInstance().connect();
+        // Application will go out of scope here and deinitialize itself
+    }
 
-    int ret = a.exec();
-
-    SettingsManager::getInstance().save();
+    chatterino::SettingsManager::getInstance().save();
 
     // Save settings
     pajlada::Settings::SettingManager::save();
 
-    WindowManager::getInstance().save();
-
     return ret;
 }