datetime scope imports

more scope imports

restore std.time global import

check scope imports

update windows unitises
add local import
fix import
fix scope import for Windows
remove .dup
fix binaryFun

1. Make binaryFun correct for integer comparison.
2. Remove import of half of phobos for 100% cases in phobos.

`sort`, `cmp`, `find`, `startsWith`,  `sum` and other algorithms would
be compiled faster.

fix safeOp

fix safeOPs

Fix new unittest

fix binaryReverseArgs

fix not

fix new code

fix spaces after if

optimization

1. CTFE
2. Runtime (without inlining)

change condition

fix new code

fix safeOp

optimize CTFE

CTFE optimization

immutable -> enum

remove aliases

remove macros

CTFE matching

add debug info && fix not

add spaces

minor fix

added debug example

add debug unittests & fix

fix also and add unittests

fix

typo

if (!__ctfe) assert(false); added

use 01
Merge pull request #2681 from 9il/datetime

std.datetime: clean imports
remove binary files
Merge pull request #2738 from 9il/dt2

remove binary files
Merge pull request #2723 from 9il/binaryfun

fix binaryFun
Add the capability to create tagged pointer and classes in bitmanip