Added Data Processor using Nodes (#152)

* Added imnodes

* Added basic data processor view. Still needs to be cleaned up

* Make sure all attached links get properly removed when a Node is deleted

* Cleanup and API exposing

* Added data provider overlays and integrate them with the data processor

* Optimized data processing

* Node UI enhancements

* Added support for all themes to the nodes editor

* Improved data processor context menus

* Fixed data processor context menu showing up everywhere

* Make hex editor context menu behave the same as data processor one

* Add different node pin types and prevent incompatible ones from being connected

* Don't require explicitly marking node as end node

* Fixed plugin copying

* Added some more nodes

cmake/build_helpers.cmake

@@ -139,13 +139,15 @@ endmacro()
 
 macro(createPackage)
     file(MAKE_DIRECTORY "plugins")
+
     foreach (plugin IN LISTS PLUGINS)
         add_subdirectory("plugins/${plugin}")
         add_custom_command(TARGET imhex POST_BUILD
-                COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                COMMAND ${CMAKE_COMMAND} -E copy
                 $<TARGET_FILE:${plugin}>
-                $<TARGET_FILE_DIR:imhex>/plugins)
+                $<TARGET_FILE_DIR:imhex>/plugins/$<TARGET_FILE_NAME:${plugin}>)
     endforeach()
+
     add_custom_command(TARGET imhex POST_BUILD
             COMMAND ${CMAKE_COMMAND} -E copy_if_different
             $<TARGET_FILE:libimhex>