Multilevel buffer

Buffer changes simplified and moved into a new branch based off the latest development branch.  Code has been put directly into the BufferExtension class instead of extending it as discussed in the meeting. 

Buffer changes:
1. Faster stream startup.
2. Building a larger buffer when the file is playing on the highest adaptation.
3. Larger buffer for long form content when at top adaptation. 

Other Changes: 
1. Added Akamai logo to index page contributors section.
2. Autoscale chart by removing hardcoded max value for yaxis to support buffer changes. 

Thank you for taking the time to review my contribution.