Documentation changes

Moved 'Build..' and Licence files to WhiteCoreDocs folder
Reworded 'ReadMe.txt'
Updated ServerConfiguration/Services.ini comments
Auto backup removal after (nn) days

Add processing for removal of backup (sim) files older than nn days
Add new command "delete sim backups"
Add "ArchiveDays" field to Config/Sim/Data/FileBased.ini(.example)