pidgin/nest

Add a new post on the bintray shutdown and update previous posts that pointed to bintray

Testing Done:
Ran locally

Reviewed at https://reviews.imfreedom.org/r/478/
REVIEWBOARD_URL = "https://reviews.imfreedom.org/"
REPOSITORY = "pidgin/nest"
REPOSITORY_TYPE = "mercurial"
BRANCH = "default"
LAND_DEST_BRANCH = "default"
LAND_PUSH = False