chests.yaml should allow symbolic names

[sshipway]

Currently, chest items need to be specified by their object ID. It would be better if it were to allow symbolic names.

Probably the place to do this is in ItemReader.read; if the first item is non-numeric then call matchMaterial()

        try {
            itemid = Integer.parseInt(split[0]);
        } 
        catch( Exception e ) {
            Material m = Material.matchMaterial(split[0].toLowerCase().trim());
            if( m == null ) {
                SurvivalGames.error("ItemReader: invalid id "+split[0]);
                return null;
            }
            itemid = m.getId();
        }
        try {
            if(split.length == 1){
                return new ItemStack(itemid);
            }else if(split.length == 2){
                return new ItemStack(itemid, Integer.parseInt(split[1]));
            }else if(split.length == 3){
                return new ItemStack(itemid, Integer.parseInt(split[1]), Short.parseShort(split[2]));
            }else{

[ThunderGemios10]

@sshipway Hmm, Yes it would be better if it allowed symbolic names, I might start working on it if i find enough Free Time.