Use Twitter instead of website.
Text overlap in parameters describtion

Just go to: http://docs.gl/gl4/glGetTexLevelParameter and see for yourself

![overlap](https://cloud.githubusercontent.com/assets/763216/4332613/08a998d2-3fd6-11e4-87e8-6012747c2c6e.png)

Fix tested on Chrome v37 and IE11

Hope this helps
Merge remote-tracking branch 'remotes/lavisan/patch-1'
Include contributors credit.
Try to keep well-formed HTML by fixing some header tags and not stripping quotes around attributes.