add cov testing to win32.mak
Make std.math compile on Linux/PPC64.

Adds some constants and moves some code to allow std.math to be
compiled on Linux/PPC64.
Merge pull request #1214 from WalterBright/addcov

add cov testing to win32.mak
Fix big endian version of ripemd.

The upper bound of the array index is obviously wrong.
Merge pull request #1234 from redstar/beripe

Fix big endian version of ripemd.
Merge pull request #1232 from redstar/ppcmath

Make std.math compile on Linux/PPC64.
Fixes Issue 9839 - Select should be able to select symbols.
Merge pull request #1235 from AndrejMitrovic/Fix9839

Issue 9839 - Select should be able to select symbols.
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