*Added An ErrorLogger class which responsible for Create an Error log which prints all the error
 that occured in the convertion stage between the mila xml format to the vrt files.
 Every log shows the file which the error occured in ,the  error itself  and the problematic node which caused the problem.
 For the work of the ErrorLogger i created a global errorlogger which all the classes have permission to write to him.
 When a problem occur the programmer can call the print method of the CErrorLogger and deliver it a string with the error and the xml node which caused the problem.
*Removed  the error and files output from console.
*Fix the issue when we printing an empty cells - now cells which holds flags will hold 'N' chars as the number of the intended flags. A non flags cells will hold the char 'N'.
*Aranged the includes and added defines to CustomDefinitions.