2.5.8

• Fixed Bambuser oembed (#86)
• Added Adapter for 500px.com (#93)
• Some internal improvements (#84, #90)
• Other code improvements (#87, #91, etc).
• Removed giphy adapter. (#99)
• Code with <embed> or <object> tags have less priority than others (like <iframe> or <script>).
• Tested in php7

thanks @thekillerfox, @zyuhel