Add --show-progress to force display progress bar

This is a relatively large commit that implements two major features:

1. Implement --show-progress switch to force the display of the progress bar in
   any verbosity level
2. Edit the implementation of the progress bar so that the filename is displayed
   in the same line.

doc/ChangeLog

@@ -1,3 +1,7 @@
+2014-05-01  Darshit Shah  <darnir@gmail.com>
+
+	* wget.texi: Add documentation for --show-progress
+
 2014-02-10  Yousong Zhou  <yszhou4tech@gmail.com>
 
 	* wget.texi: Add documentation for --start-pos.

doc/wget.texi

@@ -751,6 +751,16 @@ command line.  The exception is that, when the output is not a TTY, the
 ``dot'' progress will be favored over ``bar''.  To force the bar output,
 use @samp{--progress=bar:force}.
 
+@item --show-progress
+Force wget to display the progress bar in any verbosity.
+
+By default, wget only displays the progress bar in verbose mode.  One may
+however want wget to display the progress bar on screen in conjunction with
+any other verbosity modes like @samp{--no-verbose} or @samp{--quiet}.  This
+is often a desired a property when invoking wget to download several small/large
+files.  In such a case, wget could simply be invoked with this parameter to get
+a much cleaner output on the screen.
+
 @item -N
 @itemx --timestamping
 Turn on time-stamping.  @xref{Time-Stamping}, for details.