Reference for unit 'SysExtra': Procedures and functions

`ClockOff`		Stops timing and returns the number of milliseconds elapsed.
`ClockOn`		Starts a timing.
`DecodeDuration`		Decode a duration.
`DurationToStr`		Converts a duration into string (HH:MM:SS[.ss]).
`EncodeDuration`		Encode a duration.
`LoadBinaryFile`
`LoadTextFile`
`PathIsAbsolute`		Returns `true` if `Path` is an absolute path.
`PathIsUnixAbsolute`		Returns `true` if `Path` is an absolute path under unix.
`PathIsWindowsAbsolute`		Returns `true` if `Path` is an absolute path under windows.
`Rand`		Returns a random number in range `[0..RandMax]` or in range `[0..Limit - 1]`.
`RandRange`		Returns a random number in range `[Min..Max]`.
`RandSeed`		Choose a seed for `Rand` and `RandRange`.
`StrToDuration`		Converts a string formated as HH:MM:SS[.ss] to a duration.
`SystemTime`
`UnusedParameter`		This procedure does nothing. It just indicates that a parameter is not used.
`UnzipData`		Returns Data unzipped.
`ZipData`		Returns Data zipped.