Removed deprecated functions from std.path
Update index.d

Fix std.ascii link
Merge pull request #1228 from Safety0ff/patch-1

Fix std.ascii link
Updated unittest.d
Merge pull request #1227 from kyllingstad/std-path-deprecations

Removed deprecated functions from std.path
remove dead code
Merge pull request #1230 from WalterBright/rmdeadcode

remove dead code
Fix std.BigInt bug #9548 plus 4 other bugs.