BigInt enhancement: make std.math.abs work with BigInt (issue 6486)
BigInt enhancement: add opCast!bool to BigInt (issue 4120)
[comments] Remove old commented out code in `std.json`.
[whitespace] Fix spaces in `std.json`.
[styling] Put open bracket on its own line in `std.json`.
[refactoring] Minor refactoring of `std.json`.
Merge pull request #1236 from Safety0ff/bigintenh

BigInt enhancements: add opCast!bool and make std.math.abs work
Merge pull request #1206 from denis-sh/std.json-improvements-1

`std.json` refactoring
build phobos as .so
Fix documentation of std.digest.ripemd

Fixes the broken link to the source file and beautifies the reference list.
Merge pull request #1242 from redstar/ripedoc

Fix documentation of std.digest.ripemd
fix Issue 9836 - std.array.popFront does not work with alias this.

empty, front, popFront, back, popBack should work with alias this type.
Merge pull request #1233 from 9rnsr/fix9836

Issue 9836 - std.array.popFront does not work with alias this.
Fixes Issue 7666 - Implement function to reverse fields of a tuple.
Merge pull request #1244 from AndrejMitrovic/Fix7666

Issue 7666 - Implement function to reverse fields of a tuple.
Revert Fix for 7666.
Merge pull request #1246 from AndrejMitrovic/Revert7666

Revert Fix for 7666.
Merge pull request #1240 from WalterBright/build-so-obj

build phobos as .so
std.variant: Fix "ditto ditto" documentation bug
Merge pull request #1251 from CyberShadow/patch-3

std.variant: Fix "ditto ditto" documentation bug