Theme tweaks (gameplay transition, eval)

Merge branch '5_1-new' of https://github.com/stepmania/stepmania into…

… 5_1-new

Correct hold part heights in default noteskin.

Merge pull request stepmania#1248 from stepmania/master

Update 5_0 branch

Preparing for 5.0.12.

Player.cpp forward declaration of NewField was inconsistent with actu…

…al declaration.

Put French in credits instead of français to match other entries.

Added RayZa to translation credits.