upgraded int array ops
more fixes and formatting etc.
consistent use of size_t
improve unittests
move _d_createTrace to where it belongs
move _moduleXXX to minfo.d
Merge pull request #561 from WalterBright/move-module-functions

move _moduleXXX functions from dmain2.d to minfo.d
Merge pull request #560 from WalterBright/move_d_createTrace

move _d_createTrace from dmain2.d to deh.d and deh2.d
add missing comments
Merge pull request #562 from WalterBright/add-comments-dmain2

add missing comments to dmain2.d
Merge pull request #471 from John-Colvin/64_arr_ops

upgraded int array ops