Merge branch '16-align-center-release-submit-btn' into 'init19'

Resolve "align/center Release + Submit btn"

Closes #16

See merge request !9

app/views/samples/_show.html.erb

@@ -127,7 +127,7 @@ $(document).ready(function(){
   <%end %>
  </tbody>
 </table>
-
+<br>
 <%if @sample.status == "in preparation" %>
   <div class='absolute'><%=link_to (@sample.status ? "Submit for Measurement" : "No"),
      Measured_sample_path(@sample), :action => 'solve', :class => 'btn btn-block btn-success' %>
@@ -137,5 +137,5 @@ $(document).ready(function(){
     ReleaseMeasurment_sample_path(@sample), :action => 'solve', :class => 'btn btn-block btn-success' %>
   </div>
 <%end%>
-
+<br>
 <p><%=link_to "Download PDF", sample_path(@sample, format: "pdf"), target: "_blank" %><p>