Merge branch 'master' of https://github.com/apache/incubator-skywalking-website

# Conflicts:
#	docs/downloads/README.md
#	docs/events/README.md
#	docs/zh/downloads/README.md
#	docs/zh/events/README.md
tree: 4eeca74b17087044f592918765a4f368a4575f9c
  1. .gitignore
  2. .travis.yml
  3. README.md
  4. docs/
  5. package-lock.json
  6. package.json