Constraints can override their own number of solver iterations (either more or less than the default) or leave it default (-1)

Bump version to 2.80

Extras/Serialize/BulletFileLoader/bFile.h

@@ -145,6 +145,10 @@ namespace bParse {
 
 		void	dumpChunks(bDNA* dna);
 		
+		int		getVersion() const
+		{
+			return mVersion;
+		}
 
 		
 	};