add levelized cost of energy to wind

fixes #53 again

schemas/BaseElements.xsd

@@ -1538,13 +1538,13 @@
 									<xs:element minOccurs="0" name="AnnualOutput"
 										type="RatedAnnualkWh">
 										<xs:annotation>
-											<xs:documentation>[kWh] Projected Annual Output for a typical meterological year as determined by PVWatts. </xs:documentation>
+											<xs:documentation>[kWh] Projected Annual Output for a typical meterological year as determined by PVWatts or similar. </xs:documentation>
 										</xs:annotation>
 									</xs:element>
 									<xs:element minOccurs="0" name="LevelizedCostOfElectricity"
 										type="Cost">
 										<xs:annotation>
-											<xs:documentation>[$] The LCOE is the total cost of installing and operating a project expressed in dollars per kilowatt-hour of electricity generated by the system over its life. Can be calculated with System Advisor Model or through a simplified calculation at http://www.nrel.gov/analysis/tech_lcoe.html.</xs:documentation>
+											<xs:documentation>[$] The LCOE is the total cost of installing and operating a project expressed in dollars per kilowatt-hour of electricity generated by the system over its life. Can be calculated with System Advisor Model, a similar software, or through a simplified calculation at http://www.nrel.gov/analysis/tech_lcoe.html.</xs:documentation>
 										</xs:annotation>
 									</xs:element>
 									<xs:element ref="extension" minOccurs="0"/>
@@ -1600,6 +1600,12 @@
 											<xs:documentation>[ft]</xs:documentation>
 										</xs:annotation>
 									</xs:element>
+									<xs:element minOccurs="0" name="LevelizedCostOfElectricity"
+										type="Cost">
+										<xs:annotation>
+											<xs:documentation>[$] The LCOE is the total cost of installing and operating a project expressed in dollars per kilowatt-hour of electricity generated by the system over its life. Can be calculated with System Advisor Model, a similar software, or through a simplified calculation at http://www.nrel.gov/analysis/tech_lcoe.html.</xs:documentation>
+										</xs:annotation>
+									</xs:element>
 									<xs:element minOccurs="0" ref="extension"/>
 								</xs:sequence>
 							</xs:complexType>