update doc; Prepare CRAN release 0.2.1
diff --git a/docs/awesome_table_in_html.html b/docs/awesome_table_in_html.html
index d88d6fc..c0c276f 100644
--- a/docs/awesome_table_in_html.html
+++ b/docs/awesome_table_in_html.html
@@ -1603,13 +1603,13 @@
<thead>
<tr>
<th style="border-bottom:hidden"></th>
-<th style="text-align:center;border-collapse: separate !important; margin-right: 10px !important;" colspan="2">
+<th style="text-align:center;" colspan="2">
Group 1
</th>
-<th style="text-align:center;border-collapse: separate !important; margin-right: 10px !important;" colspan="2">
+<th style="text-align:center;" colspan="2">
Group 2
</th>
-<th style="text-align:center;border-collapse: separate !important; margin-right: 10px !important;" colspan="2">
+<th style="text-align:center;" colspan="2">
Group 3
</th>
</tr>
@@ -1765,28 +1765,28 @@
<thead>
<tr>
<th style="border-bottom:hidden"></th>
-<th style="text-align:center;border-collapse: separate !important; margin-right: 10px !important;" colspan="6">
+<th style="text-align:center;" colspan="6">
Group 6
</th>
</tr>
<tr>
<th style="border-bottom:hidden"></th>
-<th style="text-align:center;border-collapse: separate !important; margin-right: 10px !important;" colspan="4">
+<th style="text-align:center;" colspan="4">
Group 4
</th>
-<th style="text-align:center;border-collapse: separate !important; margin-right: 10px !important;" colspan="2">
+<th style="text-align:center;" colspan="2">
Group 5
</th>
</tr>
<tr>
<th style="border-bottom:hidden"></th>
-<th style="text-align:center;border-collapse: separate !important; margin-right: 10px !important;" colspan="2">
+<th style="text-align:center;" colspan="2">
Group 1
</th>
-<th style="text-align:center;border-collapse: separate !important; margin-right: 10px !important;" colspan="2">
+<th style="text-align:center;" colspan="2">
Group 2
</th>
-<th style="text-align:center;border-collapse: separate !important; margin-right: 10px !important;" colspan="2">
+<th style="text-align:center;" colspan="2">
Group 3
</th>
</tr>
@@ -2447,10 +2447,10 @@
<thead>
<tr>
<th style="border-bottom:hidden"></th>
-<th style="text-align:center;border-collapse: separate !important; margin-right: 10px !important;" colspan="3">
+<th style="text-align:center;" colspan="3">
Group 1<sup>†</sup>
</th>
-<th style="text-align:center;border-collapse: separate !important; margin-right: 10px !important;" colspan="3">
+<th style="text-align:center;" colspan="3">
Group 2<sup>‡</sup>
</th>
</tr>