* 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.
* Move const.inc and compilers.inc back to main source directory
* Move remaining few lines of code from heidicomp.pas to helpers.pas
* Remove components/compilerdetection and components/heidisql
* Remove remainders of EDBImage component, unused since Aug 08.
* Merge with heidi related changes (basically only SingleLineMode)
* Readd missing file changelog.htm to keep that file list consistent with the downloaded one
* Merge our own compiler detection again
* Disable including a further compiler includefile jedi.inc
Range and overflow checking can be turned off when building a release exe to improve performance slightly.
Debugging options can be turned off when building a release exe to reduce the executable file size.
* Fix paths to rtl.dcp and vcl.dcp
* Adds missing references to packages in HeidiComponents.dproj (followup to rev 751)
* Drop paths to DCP files which are already specified in search paths
