* refactor(storage): move unused code to repo that needs it
Turns out that a bunch of code is only needed in IDPE. This change
removes that code, and another PR adds it to IDPE.
* refactor(storage): export KeyMerger
* refactor(storage): export NilSortHi and NilSortLo
* refactor(storage): move StringIterator & friends to IDPE
* refactor(storage): unexport a few test helper funcs
I did this with a dumb editor macro, so some comments changed too.
Also rename root package from platform to influxdb.
In interest of minimizing risk, anyone importing the root package has
now aliased it to "platform" so that no changes beyond imports were
necessary in those files.
Lastly, replace the old platform module to local path /dev/null so that
nobody can accidentally reintroduce a platform dependency while
migrating platform code to influxdb.
Jonathan A. Sternberg
Jacob Marble
Mark Rushakoff
Stuart Carnie