* Fixes#4632.
* 1:27 am coding best coding
* fixes a warning
* Removes the last of the gender macros. Gender is dead.
* gender II: the travis-ing
* linebreaks are dead too.
* oops i accidentally the gender, also ambiguous gender is now taken into account for get_visible_gender
Rewrites shield handling to be less hardcoded.
Shields now take into account the damage source and direction when blocking.
Riot shields no longer block most bullets, but are better at blocking melee and thrown items than they were previously.
Energy shields block projectiles with a similar probability as they did before, and block melee and thrown as well as riot shields do.
Shields no longer block from directly behind the player.
Weapons now only block melee attacks.
Cool effects when blocking with an energy shield or energy sword (including holoswords).
