* Removed process_information, moving it to the process class
* Added conversion class, file utils class and type collection header
* Started converting QStrings to std::string
* More conversion work from Qt classes to STL
* Fixed a small problem in fileutils, application works again
* Removed no longer usable error_codes header, created process detail window
* Created tab control, with two tabs 'General' and 'Callstack' in the process detail window
* Implemented neat way of acquiring a process's current callstack
* Completely, and workingly implemented callstack in process detail window