Change from CR+LF to LF in all-in-one-seo-pack
Use an excerpt for og:description if no AIOSEO description

All in One SEO uses a content directly if AIOSEO description is not
availabe. The priorities should be: AIOSEO description > excerpt >
content.
Remove Jetpack's Open Graph meta tags

Because they are coflicted with All In One SEO Pack.
Cherry-pick the patches for Jetpack from 2.9.3 to 3.1.1