Added more to DataFrame.html 2

docs/HTML/DataFrame.html

@@ -80,7 +80,7 @@
 
   <H2><font color="blue">Summary</font></H2>
 <P>
-  <font size="+1">DataFrame</font> is a templatized and heterogeneous C++ container designed for data analysis for statistical, machine-learning, or financial applications. You can think of data-frame as a two-dimensional data structure of columns and rows just like an Excel spreadsheet, or a SQL table. But in case of C++ DataFrame, your data needn’t be two-dimensional necessarily. Columns in the C++ DataFrame could be vectors of any type, including DataFrame’s or other containers. So, a C++ DataFrame can be of any dimension.
+  <font size="+1">DataFrame</font> is a templatized and heterogeneous C++ container designed for data analysis for statistical, machine-learning, or financial applications. You can think of data-frame as a two-dimensional data structure of columns and rows just like an Excel spreadsheet, or a SQL table. But in case of C++ DataFrame, your data needn’t be two-dimensional necessarily. Columns in the C++ DataFrame could be vectors of any type, including DataFrames or other containers. So, a C++ DataFrame can be of any dimension.
   <UL>
     <LI>A DataFrame can have one index column and many data columns of any built-in or user-defined types</LI>
     <LI>Each column in DataFrame could be at most as long as the index column</LI>