Use class system for 2v2; Add Iron Forge

CMBW-maps/melee/2v2/Class 2 - Uprising/Info - Uprising-class.md

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+# UPRISING
+## Class 2 battlegrounds
+
+Uprising-class maps are recent creations, whose authors have deemed them relatively-complete, without having seen enough matches to determine their ranking.

CMBW-maps/melee/2v2/Class 4 - Jester/Info - Jester-class.md

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+# JESTER
+## Class 4 battlegrounds
+
+Jester-class maps are have had their time to be tested, and have been deemed too nonstandard to achieve consistent match quality. Maps like these may have been a distant competitive battleground, or may have never seen the light of day...