Remove deprecated and undocumented hasLocalAliasing, hasRawLocalAliasing, hasLocalObjects
Merge pull request #2807 from Geod24/haslocalaliasing

Remove deprecated / undocumented hasLocalAliasing, hasRawLocalAliasing, hasLocalObjects
Document byLineCopy's caching of front

Use byLineCopy instead of byLine.map!idup in stdin example.
Merge pull request #2810 from ntrel/byLineCopy-docs

Document std.stdio.File.byLineCopy's caching of front