Flatten dir structure, update docstrings

src/lmp/structs.jl

@@ -3,3 +3,26 @@
 # Released under the modified BSD license. See COPYING.md for more details.
 
 abstract type PricingMethod end
+
+struct ConventionalLMP <: PricingMethod end
+
+"""
+    struct AELMP <: PricingMethod 
+        allow_offline_participation::Bool = true
+        consider_startup_costs::Bool = true
+    end
+
+Approximate Extended LMPs.
+
+Arguments
+---------
+
+- `allow_offline_participation`:
+    If true, offline assets are allowed to participate in pricing.
+- `consider_startup_costs`: 
+    If true, the start-up costs are averaged over each unit production; otherwise the production costs stay the same.
+"""
+Base.@kwdef struct AELMP <: PricingMethod 
+    allow_offline_participation::Bool = true
+    consider_startup_costs::Bool = true
+end