added risk styles to api

alphamind/api.py

@@ -11,11 +11,18 @@ from alphamind.analysis.quantileanalysis import quantile_analysis
 from alphamind.data.engines.universe import Universe
 from alphamind.portfolio.constraints import Constraints
 
+from alphamind.data.engines.sqlengine import risk_styles
+from alphamind.data.engines.sqlengine import industry_styles
+from alphamind.data.engines.sqlengine import macro_styles
+
 
 __all__ = [
     'SqlEngine',
     'factor_analysis',
     'quantile_analysis',
     'Universe',
-    'Constraints'
+    'Constraints',
+    'risk_styles',
+    'industry_styles',
+    'macro_styles'
 ]
\ No newline at end of file