Use scope imports in std.container package

part2

part3
dummy ranges module

rm

rename & add scope imports

update scope imports

std.algorithm: clean imports

update scope imports

update global imports

update *.mak

ditto

formatting

fix typo

fix scope import std.uni

update windows  *.mak

add import to unittests

tabs fix

fix unittest

fix indentation
Merge pull request #2721 from 9il/container

Use scope imports in std.container package
Merge pull request #2691 from 9il/dummyranges

move dummy ranges and clean imports in std.algorithm
std.file: clean imports

fix

fix

fix

fix

fix

fix

fix
Merge pull request #2726 from 9il/file

std.file: clean imports