Discribed rules within description

With rules there is no greater than pi possible. Therefore, moved the rules to the description

Signed-off-by: Markus Waldmann <Markus.Waldmann@stud.hs-kempten.de>

Author: Markus Waldmann

osi_environment.proto

@@ -448,21 +448,15 @@ message EnvironmentalConditions
         //
         // Unit: rad
         //
-        // \rules
-        // is_greater_than_or_equal_to: -PI
-        // is_less_than_or_equal_to: 2PI
-        // \endrules
+        // The preferred angular range is [0, 2pi]
         //
         optional double azimuth = 1;
 
         // Solar elevation angle
         //
         // Unit: rad
         //
-        // \rules
-        // is_greater_than_or_equal_to: -PI
-        // is_less_than_or_equal_to: PI
-        // \endrules
+        // The preferred angular range is [-pi, pi]
         //
         optional double elevation = 2;