…_id`, closes elastic#421.

closes elastic#421

Fixes #418

Renames in `project` require a small conceptual change in the local
execution planning: So far, the layout always contained one entry per
block and there was a 1:1 mapping from attributes to blocks/channels.
This assumption no longer holds as the same block might be mapped to
multiple attribute ids. E.g. the query `from test | project x = count, y
= count` creates a project operator that drops all blocks except `count`
and is associated with the mapping `Id(x) -> 0, Id(y) -> 0`.

Add geopointshape benchmarks on nightly/release pages and update history
of changes.

Closes elastic#129

code block says `Dnetwordaddress.cache.ttl` instead of `Dnetworkaddress.cache.ttl`. Copying and pasting leads to lots of troubleshooting since the two words are incredibly close to each other.

Fixes elastic#421