update about page & release note
# This is a combination of 2 commits.
# The first commit's message is:

version bump, add intro image & anigif

# The 2nd commit message will be skipped:

#	update document for v0.10.0
update document for v0.10.0
Merge branch 'gh-pages' of github.com:rhiokim/haroopad into github/gh-pages

* 'gh-pages' of github.com:rhiokim/haroopad:
  added style for kbd tag