* added support for reading borland c++ builder 6 projects
* add: fetch sysdefines from project
add: start providing bcb6 predefines (WIP)
* configure all the internal defines for BCB6
* make sure define strings don't start with ';'
* improvements on bwoesters BCB6 project support
- improved `*.bpr` XML handling by reducing the number of loops
- added `const` where aplicable
- optimized compiler argument parser performance
- reformatted code with provided astyle config
* - undo looping (keep it the same as the other implementations)
- keep parsing of cflags simple and separate from the synonym cleanup (no need for micro optimization in this place)
- move input validation to FileSettings::setDefines
- re-run astyle
* use [] instead of at() when comparing characters
* Define value parsing from compile_commands.json
* Handle escaping in defined values
* Added test for importCompileCommands
* Added used defines for imported projects
* Fixed unnecessary string literals
* transform relative paths with the help of the project dir to absolute
paths so the actual checker can resolve include paths defined in
property sheets
* fix coding style (one-line if)
* add existing importproject testfile to visual studio project to appear
when loading solution
* also explicitly export struct from within class to enable linking in
testrunner