This adds throw_alert() and /obj/screen/alert, a system that allows you to do custom hud alerts for any variety of things from "You're too cold!" to mecha status indicators for the pilot.
There's quite a few things that actually got replaced; the
fire/oxy/tox/co2 alerts are all now just alerts, as is nutrition. There's also a number of new alerts, such as blindness, highness, legcuffed, buckled, handcuffed, and probably some more I missed; read code/_onclick/hud/alert.dm and see for yourself!
Additionally, a number of tweaks have been done to resisting code, to make it so that there's an indicator when you're buckled or handcuffed, and can just click the alert to start resisting. This includes a refactor that combines the logic for lockers, holders all into one proc, called container_resist().
Also, the health and internals indicator got moved down one tile each. Needed room for the alerts. If we add the oxygen tank action buttons from /tg/ and remove the internals indicator, the health indicator can go back where it was originally.
Alerts, pictured in the top right.

* Changeling Name/Desc Fixy
Minor var fixes for the changeling combat boots variation. Apparently name and desc were flipped around, resulting in abnormal name output when removed from a dead Beta Replicant.
* Changelog
* Chaning undislocate to relocate.
Have to use web browser for this one at the moment.
* Changes undislocate -> relocate
* Last file to change to relocate
* Changes it to the best medical term for the action.
* Reduce -> Relocate
* 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
* Polaris initial plane upstream merge
* POLARIS: Fix RIG visors with new plane system, and material scanner VIS_FULLBRIGHT
* POLARIS: Fix GetFlatIcon so that cameras and id pictures don't show the HUD overlays.
* POLARIS: Adds a 'alter values' proc for plane master ease of tweaking
Setting stuff like colorblindness variety and things.
* Remove NIF reference, fix lighting layer define
* Handle effects above lighting plane
* Moved all layer defines to planes+layers.dm
* Fixed overlays that are supposed to be above lighting to use the PLANE_LIGHTING_ABOVE
* Merge: 3000% human/update_icons() speed improvement
* Merge: Avoid ghosts pointing at things