Art Pass #1
Merge branch 'master' of https://github.com/stepmania/stepmania

Conflicts:
	Themes/default/Graphics/ScreenWithMenuElements header/default.lua
	Themes/default/metrics.ini
Merge branch 'master' of https://github.com/stepmania/stepmania
Merge branch 'master' of https://github.com/stepmania/stepmania
Merge branch 'master' of https://github.com/stepmania/stepmania
Merge branch 'master' of https://github.com/stepmania/stepmania
Fixed GAMESTATE:GetCurrentStage to use correct logic for determining if all human players are on final stage.
THEME:GetPath lua functions can now pass true for the third arg if the element is optional.
Fixes to various StageDisplay things in default.
thify_number and thified_curstage_index lua functions added to default/Scripts/04 Other.lua.
Merge branch 'master' of https://github.com/stepmania/stepmania
Merge branch 'master' of https://github.com/stepmania/stepmania
fix some of the errors in the luadoc; doc returns
Added ScreenHeartEntry to default theme.
Merge branch 'master' of https://github.com/stepmania/stepmania
New NumPadEntry actor, used by ScreenHeartEntry.
Merge branch 'DefaultHeart' of https://github.com/kyzentun/stepmania into b4-heartRate
Improve HeartEntry screen
Improve HeartEntry screen
Various changes to things in the Docs folder:
* remove unused WindowsNotes.txt
* various sm-ssc -> StepMania (and similar) changes
* Rewrote a bit of recommended_practices.txt
* Fix a copy/paste typo in anatomy_of_an_actor.lua
* many other things I can't remember; namely newlines at the end of files
Added ScreenOptionsCustomizeProfile to _fallback and default.
Merge branch 'StageDispFixes' of https://github.com/kyzentun/stepmania
Removed unused is_stage_final function from default.