Add strategy modes (#468)

* Add strategy mode

parts/modes/strategy_u.lua

@@ -0,0 +1,22 @@
+return{
+    env={
+        das=3,arr=1,
+        sequence="bagES",
+        eventSet='strategy_u',
+        bg='bg2',bgm='secret7th',
+    },
+    slowMark=true,
+    score=function(P)return{math.min(P.stat.row,200),P.stat.time}end,
+    scoreDisp=function(D)return D[1].." Lines   "..STRING.time(D[2])end,
+    comp=function(a,b)return a[1]>b[1]or a[1]==b[1]and a[2]<b[2]end,
+    getRank=function(P)
+        local L=P.stat.row
+        return
+		L>=200 and 5 or
+		L>=150 and 4 or
+		L>=80 and 3 or
+        L>=40 and 2 or
+        L>=20 and 1 or
+        L>=26 and 0
+    end,
+}