Ignore !important CSS tag

fixes Cocoanetics#358

Core/Source/DTCSSStylesheet.m

@@ -412,6 +412,22 @@ - (void)_addStyleRule:(NSString *)rule withSelector:(NSString*)selectors
 		NSString *cleanSelector = [selector stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
 
 		NSMutableDictionary *ruleDictionary = [[rule dictionaryOfCSSStyles] mutableCopy];
+
+		// remove !important, we're ignoring these
+		for (NSString *oneKey in [ruleDictionary allKeys])
+		{
+			NSString *value = [ruleDictionary objectForKey:oneKey];
+
+			NSRange rangeOfImportant = [value rangeOfString:@"!important" options:NSCaseInsensitiveSearch];
+
+			if (rangeOfImportant.location != NSNotFound)
+			{
+				value = [value stringByReplacingCharactersInRange:rangeOfImportant withString:@""];
+				value = [value stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
+
+				[ruleDictionary setObject:value forKey:oneKey];
+			}
+		}
 
 		// need to uncompress because otherwise we might get shorthands and non-shorthands together
 		[self _uncompressShorthands:ruleDictionary];