Rename files from HDMI2USB to Opsis

[mithro]

The files are currently named like follows;

$ ls *HDMI2USB* -l
-rw-r----- 1 mithro mithro 5577177 Oct  4 00:18 _autosave-HDMI2USB.kicad_pcb
-rw-r----- 1 mithro mithro   28585 Jan  4 15:01 HDMI2USB.bak
-rw-r----- 1 mithro mithro   62815 Jan  4 15:07 HDMI2USB-cache.lib
-rw-r----- 1 mithro mithro   61095 Nov 10 23:48 HDMI2USB.cmp
-rw-r----- 1 mithro mithro    6448 Jul 23 22:17 HDMI2USB.csv
-rw-r----- 1 mithro mithro 6247158 Jan  4 15:20 HDMI2USB.kicad_pcb
-rw-r----- 1 mithro mithro  307840 Jan  4 15:16 HDMI2USB.net
-rw-r----- 1 mithro mithro    1894 Jan  4 15:07 HDMI2USB.pro
-rw-r----- 1 mithro mithro    1596 Jan  4 15:07 HDMI2USB-rescue.lib
-rw-r----- 1 mithro mithro   29759 Jan  4 15:07 HDMI2USB.sch
-rw-r----- 1 mithro mithro  361855 Jan  4 15:16 HDMI2USB.xml

They really should be named Opsis.XXX -- IE Do a s/HDMI2USB/Opsis/ in the file names.

Should also fix the title and similar things in the file's actual content.