A few additions to the mainline version


 * I further simplified the `Addressing` module, renamed some functions (there were some names that have lost meaning like `int32converter). Hopefully, this makes it a bit more understandable. I also marked functions as `inline` (but have not measured it)

 * I did some more changes in `LinearIndex`. Most importantly, the index used to create an array with the keys (and then also a reversed array, when needed). This is no longer necessary, because we can just index in the collection of keys directly. I also deleted some cases in `Lookup` (big red chunk below) which were supposed to handle the case when address cannot be converted to integer.

 * I added some documentation for pivot table - it's cool!