Improved branch sorting

Features added

• -sort supports ordering by the number of times the branch was matched (counts)
• when sorting the input line number is used as a tie-breaker
• -down reverses the order of the branches on output
• -version prints the code version
• In Lua scripts the command-line arguments are now available in the variable frangipanni_args
• -order is now deprecated and the -sort option synonym is added