Bug 7143: Add missing people to history.txt

Bug 7143: Add missing people to history.txt

Indranil Das Gupta needs to be included. Emmanuele Somma was
missed a while back, so adding ad shifting numbers for people after her.

Some tab fixes too, I don't have the time to fix them all.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>