Feature/CMake (#1443)

General CMake cleanup/overhaul
* Enable precompiled headers for all projects
* Move specifications itto separate CMakeLists files
  * Add openspace-core as a subdirectory
  * Move handle_modules functionality into modules/CMakeLists.txt
  * Move handleapplications logic into apps/CMakeLists.txt
* Introduce openspace-module-collection interface library to simplify inclusion of modules in applications
* Turn module initialization into a two-step process to adapt to the new minimal dependency scenario
* Compile time speedup
  * Remove circular dependencies between modules and core preventing multithreaded compilation on MSVC
  * Build Spice multithreaded and as static library
  * Remove dependency from core to module-webbrowser
  * Remove unused dependency from kameleon
  * Remove additional unnecessary dependencies
  * Cleanup volume/kameleon/kameleonvolume modules
  * Fix visibility issues. Restrict include paths
  * Compile kameleon in parallel
* Other cleanup
  * Only copy CEF files from one target (hard-coded to OpenSpace right now)
  * Remove unused instrumentation code
  * Remove the ability to render AABB for globes as it caused a circular dependency between GlobeBrowsing and Debugging
  * Removing compiler and cppcheck warnings
  * Turn almost all includes into non-system includes
  * Don't warn on deprecrated copy
* Updated submodules

modules/webbrowser/webbrowsermodule.cpp

@@ -25,8 +25,9 @@
 #include <modules/webbrowser/webbrowsermodule.h>
 
 #include <modules/webbrowser/include/browserinstance.h>
-#include <modules/webbrowser/include/screenspacebrowser.h>
 #include <modules/webbrowser/include/cefhost.h>
+#include <modules/webbrowser/include/eventhandler.h>
+#include <modules/webbrowser/include/screenspacebrowser.h>
 #include <openspace/engine/globals.h>
 #include <openspace/engine/globalscallbacks.h>
 #include <openspace/engine/windowdelegate.h>
@@ -72,6 +73,7 @@ WebBrowserModule::WebBrowserModule()
     : OpenSpaceModule(WebBrowserModule::Name)
     , _updateBrowserBetweenRenderables(UpdateBrowserBetweenRenderablesInfo, true)
     , _browserUpdateInterval(BrowserUpdateIntervalInfo, 1.f, 1.0f, 1000.f)
+    , _eventHandler(new EventHandler)
 {
     global::callback::deinitialize->emplace_back([this]() {
         ZoneScopedN("WebBrowserModule")
@@ -105,7 +107,7 @@ void WebBrowserModule::internalDeinitialize() {
         return;
     }
 
-    _eventHandler.resetBrowserInstance();
+    _eventHandler->resetBrowserInstance();
 
     bool forceBrowserShutdown = true;
     for (BrowserInstance* browser : _browsers) {
@@ -159,7 +161,7 @@ void WebBrowserModule::internalInitialize(const ghoul::Dictionary& dictionary) {
         );
     }
 
-    _eventHandler.initialize();
+    _eventHandler->initialize();
 
     // register ScreenSpaceBrowser
     auto fScreenSpaceRenderable = FactoryManager::ref().factory<ScreenSpaceRenderable>();
@@ -199,17 +201,13 @@ void WebBrowserModule::removeBrowser(BrowserInstance* browser) {
 
 void WebBrowserModule::attachEventHandler(BrowserInstance* browserInstance) {
     if (_enabled) {
-        _eventHandler.setBrowserInstance(browserInstance);
+        _eventHandler->setBrowserInstance(browserInstance);
     }
 }
 
-EventHandler WebBrowserModule::eventHandler() {
-    return _eventHandler;
-}
-
 void WebBrowserModule::detachEventHandler() {
     if (_enabled) {
-        _eventHandler.setBrowserInstance(nullptr);
+        _eventHandler->setBrowserInstance(nullptr);
     }
 }