The ExtraLibs version of Iris contains extra shared
libraries used by the likes of Python 3 and other
programs.  The aim is to make Iris more compatible
with other software using shared libraries.

It is supplied for testing and comparison with the
normal edition, pending a more generalised roll-out.

Due to the size of the additional libaries, this 
version takes more disc space, which may be significant
for !IrisRAM users - it needs 256 MB of RAM disc, but
we suggest allocating a touch more to be safe.

Users of RISC OS Direct are recommended to use this
version, as the extras libraries present match those
included in Iris in Direct v3.