start presentation package
unified frame creation for examples
presentation mode introduced
proper slide jumping
vertical centering
json reader
using JSON to create presentations
added image slide object and refactored vertical positioning
small text render fixes
static json loader
JSON loader for images
width and height for JSON images
animation timing via JSON
general static JSON loaders
more consistent use of loadFromJSON
minor fix
tie painter and camera together
key bindings in JSON
framerate
secure initialization