* 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.
To correctly import files, the user needs to first find out which character set the file is (using eg the unix 'file' utility, or whatever), then change the column charset in the table to match that type, then finally use 'insert files into fields' to insert the file contents.