update CHANGES for 1.0.2
doc: create redirect for /discid

Not sure what kind of caching sorcery was at work here,
but /discid stopped working some minutes after
c5dbf33bc87835c3aab6f35f78d813bebb8df4cc
Yes, I did clear every cache I could find and recreated doc/_build.

Anyways, this should display a link to the API when /discid is accessed
due to some pre-stable documentation links.
set version to 1.0.2