Add a basic tutorial for the tools in depot_tools.

docs/man1/git-map.1

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 .\"     Title: git-map
 .\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
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-.\"      Date: 03/25/2014
+.\"      Date: 04/04/2014
 .\"    Manual: Chromium depot_tools Manual
-.\"    Source: depot_tools 207bff1
+.\"    Source: depot_tools b4ee6b0
 .\"  Language: English
 .\"
-.TH "GIT\-MAP" "1" "03/25/2014" "depot_tools 207bff1" "Chromium depot_tools Manual"
+.TH "GIT\-MAP" "1" "04/04/2014" "depot_tools b4ee6b0" "Chromium depot_tools Manual"
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 .\" * Define some portability stuff
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 As you can see, the structure of the commit history is visible, particularly what the parents of each commit are\&. In order to see the \fIupstream\fR relationships of the branches (i\&.e\&. which branch is tracking which other branch), use the \fBgit-map-branches\fR(1) command\&.
 .SH "SEE ALSO"
 .sp
 \fBgit-map-branches\fR(1)
 .SH "CHROMIUM DEPOT_TOOLS"
 .sp
-Part of the chromium \fBdepot_tools\fR(1) suite\&. These tools are meant to assist with the development of chromium and related projects\&. Download the tools from \m[blue]\fBhere\fR\m[]\&\s-2\u[1]\d\s+2\&.
+Part of the chromium \fBdepot_tools\fR(7) suite\&. These tools are meant to assist with the development of chromium and related projects\&. Download the tools from \m[blue]\fBhere\fR\m[]\&\s-2\u[1]\d\s+2\&.
 .SH "NOTES"
 .IP " 1." 4
 here
 .RS 4
 \%https://chromium.googlesource.com/chromium/tools/depot_tools.git
 .RE