cp .so libs to install target

- preserve symlinks
fix property enforcement
Merge pull request #1718 from 9rnsr/enforceProp

fix property enforcement
Result of __traits(parent) may not have a type
Merge pull request #1719 from yebblies/typeofmodule

Result of __traits(parent) may not have a type
Fix and test for JSONValue(true), JSONValue(false)
Merge pull request #1720 from shoo/fix_json

Fix and test for JSONValue(true), JSONValue(false)
fix bool test
Remove useless Tuple from chain
missing space in joiner example
Merge pull request #1726 from John-Colvin/patch-6

missing space in joiner example
Remove uses of nceg operators from std.math
Remove cases where an array is used in a boolean context
Merge pull request #1727 from yebblies/issue4733

Remove cases where an array is used in a boolean context
import std.typecons outside unittests since it is needed
Merge pull request #1728 from adamdruppe/std_uni_compile_error

import std.typecons outside unittests since it is needed
Merge pull request #1723 from monarchdodra/chainTuple

Remove useless Tuple from chain
Merge pull request #1722 from monarchdodra/cleanJSON

fix bool test
Correct docs & deprecation message in std.complex.

Reference to std.format.format [sic!] should be to std.string.format.

I've also taken the opportunity to slightly clean up the module's
import statements and some whitespace errors.
Merge pull request #1730 from WebDrake/complex-format

Correct docs & deprecation message in std.complex.