* Removes TNT Unicode controls, which are no longer required. All VCL controls now have native Unicode support.
* Remove Delphi 11 packages, otherwise we would either need to keep TNT or break Unicode
* PngComponents update from Uwe Raabe on http://cc.embarcadero.com/Item/26127
* Adjust auto build process
* Since Delphi 2009, Strings are now UnicodeStrings, not AnsiStrings any longer. Fix a bunch of compiler errors which came along with this change.
TODO: Project should compile but give tons of compiler warnings.
* Add a few notes about where AVs seem to randomly occur when GridPost{Insert,Update,Delete} and EnsureDataLoaded invokes the query logic from outside the main thread.
Fixes issue #659 as far as the grids go, but not for export functions.
