seed display

seeds are displayed in pause menu and intro map
seeds from your previous run is displayed in settings after you die
fixed some minor seed inconsistency

index.html

@@ -94,6 +94,7 @@
                     <label for="seed">randomization seed:</label>
                     <input type="text" id="seed" name="seed" autocomplete="off" spellcheck="false" minlength="1" size="20" style="width: 120px;">
                     <br>
+                    <span id="previous-seed" style="color:#bbb"></span>
 
                     <label for="difficulty-select" title="effects: number of mobs, damage done by mobs, damage done to mobs, mob speed, heal effects">combat difficulty:</label>
                     <select name="difficulty-select" id="difficulty-select" style="background-color: #fff">