* first version of svg support
* merge some nanosvg pr
* look for svg icons first
* bug fix
* scale svg depends on screen size
* use irrlicht headers to get screen size
* finish isALoadableFileFormat for svg
* delete dynamically allocated memory
* fix wrong delete
* only rescale icons, due to size settings in stkskin.xml depends on the size of the image file
* check svg in FileManager::getAsset
* fix large icon in list
of images that are too big. This is then used to automatically
resize any textures (except fonts, background screen) to be
automatically resized to 512x512 if they are bigger.
