Update for the starlife symbol kit.

This kit contains 36 new shapes [ for a total of 72 ]
for backgrounds and science / space related games or apps.

There are two documents here: one is the standalone version (sl_2_96dpi) which includes only the update and should be compatible with any vector software; the second (starlife_2_symbols_96dpi) is for the last version of Inkscape: simply copy inside the symbol folder of Inkscape.