[DAZABTest.h] Add documentation

DAZABTest/DAZABTest.h

@@ -2,10 +2,31 @@
 
 @interface DAZABTest : NSObject
 
+/**
+ Run a split test in which the user is randomly assigned to one of the specified values with equal probability.
+
+ @param name A unique identifier for the test.
+ @param values The possible results a user can be assigned to.
+
+ @return The result of the split test with the given name.
+ */
 + (id)splitTestWithName:(NSString *)name values:(NSArray *)values;
 
+/**
+ Run a split test in which the user is randomly assigned to one of the conditions with the specified probabilities.
+
+ @param name A unique identifier for the test.
+ @param conditions The keys are the possible results for the user to be assigned to and the values are the weighted probabilities of each result set as an `NSNumber`.
+
+ @return The result of the split test with the given name.
+ */
 + (id)splitTestWithName:(NSString *)name conditions:(NSDictionary *)conditions;
 
+/**
+ Reset a particular test, by clearing any previous assignments for the user.
+
+ @param name A unique identifier for the test.
+ */
 + (void)resetSplitTestWithName:(NSString *)name;
 
-@end
+@end