make the register button round

Author: ashimokawa

templates/home.tmpl

@@ -3,7 +3,7 @@
 	<div class="ui stackable middle very relaxed page grid">
 		<div class="sixteen wide center aligned centered column">
 			<img width="75%" src="{{AppSubUrl}}/img/logo.svg"/><br>
-			<a href="/user/sing_up"><button class="ui button huge blue">{{.i18n.Tr "auth.sign_up_now" | Str2html}}</button></a>
+			<a href="/user/sing_up"><button style='border-radius:50vh;' class="ui button huge blue">{{.i18n.Tr "auth.sign_up_now" | Str2html}}</button></a>
 		</div>
 	</div>
 	{{if eq .Lang "undefined"}}