I'm getting rid of separation between "bare" and "safe" categories.
This separation adds one more plane to qualificator and practically
not needed. But the experiment surely worth it as led me to
understanding this.

[/~] [strings.xor] Moved from [bare.bin_ops.xor_strings].
[/~] [number.rol32] Moved from [bare.bin_ops.rol_32].
[/] [number.rol32_] Renamed from "rol32".
[/~] [number.rol32] Moved from [safe.bin_ops.rol32].
[.^] [number.rol32] Added description comment.
[.^] [number.rol32_] Added description comment.
[/~] [mechs.salsa20] Moved from [safe.salsa20].
[/~] [mechs.salsa20] Moved from [bare.crypt.salsa20].
[/] [mechs.daylength] Moved from [bare.daylength].
[/~] [mechs.geomentry.1d.segments.wrap_coord] Moved from "bare".
[/~] [mechs.geometry.2d.matrix] Moved from "bare" directory.
[/~] [mechs.cmdline] Moved from [bare.file_system].