3.4.0

Features :

• #122 Add VR support (requires StereoEffect.js and NoSleep.js)
• #148 Allow cubemap transition
• #202 Add with_credentials option
• Add zoom_speed option
• Replace the caption by a button on small screens
• Hide zoom buttons on touch enabled devices

Technical :

• Add an event loop for better render management (1b58d7c)