MediaPipe v0.6.2 - Desktop CPU & GPU examples

v0.6.2

• MediaPipe CPU & GPU graph runner for Desktop graphs with webcam
  • Mobile graphs example & doc
    - Face Detection
    - Mobile CPU
• Desktop graph examples & docs
  - Face detection
  - Desktop GPU
  - Desktop CPU
  - Object detection
  - Desktop CPU
  - Hand tracking
  - Desktop GPU
  - Desktop CPU
  - Hair segmentation
  - Desktop GPU
• Allows android to print log output from native code. Fixed issue 118
• Fix bug in YT8m feature extraction pipeline