Doxygen doc fixes.
Some mising /ref changed to <B></B>.
Added missing @param's
Added missing newlined between functions defs.
A few more typo fixes.
Downmass cameras

Fixes #8589.

Based on estimates of the two cameras I based the text on, and had at
hand.
Adds lard as a material option in lamp oil recipe.
Add TAB to NEXT_TAB, change gender key to “@”
Merge branch 'master' of https://github.com/CleverRaven/Cataclysm-DDA
Merge branch 'master' of https://github.com/CleverRaven/Cataclysm-DDA into dox
Merge branch 'doxygen-errors' of https://github.com/VlasovVitaly/Cataclysm-DDA into dox
Merge branch 'dox'