Summary:
Tried to:
- preserve existing links
- move existing images over (there were 2)
- preserve codeblocks (modified where apprporiate)
- etc.
Also as agreed upon:
- All blog posts are preserved.
- Comments are not preserved.
- Not turning on comments for future blog posts (use the FB developer group instead).
- Like button at the end of the blog post.
Depends on https://reviews.facebook.net/D63051
Test Plan: Visual
Reviewers: IslamAbdelRahman, lgalanis
Reviewed By: lgalanis
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D63105
