small improvements + add informations about noscript embed and some infos about lqip pattern
add background loading to data-bg feature (improves issue #23)
improve rias plugin
improve rias plugin
Merge branches 'gh-pages' and 'master' of https://github.com/aFarkas/lazysizes
improve rias plugin + documentation
add effect plugin (see #25)
add example for adding JS driven effects using lazybeforeunveil event (see #25)
improve documentation
improve documentation
add addClasses feature + rename maxdpr into optimumx feature
prepare for 0.5.0
add alternate srcset parser
small documentation tweaks
add perfbudget