[dsg-hallb_rich] [EXTERNAL] rich wiki updates

[Marco Mirazita]

Hi all,
I have updated the RICH-2 construction wiki page with:
- new installation document and task list
- procedures for the assembly of the RICH shell (same as RICH-1)
- RICH rotation load calculation (same as RICH-1)
- draft of the new electronic panel installation procedure
The link to the wiki page is this:
https://clasweb.jlab.org/wiki/index.php/RICH_Construction:_MODULE_2
Marco