change model name; add model for backwards compatibility

gpkitmodels/GP/aircraft/wing/chord_spar_loading.py

@@ -6,6 +6,15 @@
 #pylint: disable=invalid-name
 
 class ChordSparL(Model):
+    " place holder so dependent repos don't break "
+    def setup(self, static, Wcent):
+
+        sploading = SparLoading(static, Wcent)
+
+        return sploading
+
+
+class SparLoading(Model):
     "spar loading model"
 
     def new_qbarFun(self, c):

gpkitmodels/GP/aircraft/wing/gustloading.py

@@ -4,19 +4,19 @@
 import pandas as pd
 from gpkit import Variable, Vectorize
 from gpfit.fit_constraintset import FitCS
-from .chord_spar_loading import ChordSparL
+from .chord_spar_loading import SparLoading
 
 #pylint: disable=invalid-name, no-member, arguments-differ
 #pylint: disable=attribute-defined-outside-init
 
-class GustL(ChordSparL):
+class GustL(SparLoading):
     "spar loading model"
     new_qbarFun = None
     new_SbarFun = None
 
     def setup(self, static, Wcent, Wwing, V, CL):
 
-        self.load = ChordSparL.setup(self, static, Wcent)
+        self.load = SparLoading.setup(self, static, Wcent)
         vgust = Variable("V_{gust}", 10, "m/s", "gust velocity")
 
         with Vectorize(static.N):

gpkitmodels/GP/aircraft/wing/wing_test.py

@@ -27,8 +27,7 @@ def wing_test():
     loading = W.loading(W, Wcent)
 
     m = Model(perf["C_d"], [W, fs, perf, loading])
-    s = m.solve("mosek")
-    return s
+    m.solve("mosek")
 
 if __name__ == "__main__":
-    s = wing_test()
+    wing_test()