Add a basic tutorial for the tools in depot_tools.

docs/man1/git-map.1

 '\" t
 .\"     Title: git-map
 .\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
 .\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
-.\"      Date: 03/25/2014
+.\"      Date: 04/10/2014
 .\"    Manual: Chromium depot_tools Manual
-.\"    Source: depot_tools 207bff1
+.\"    Source: depot_tools 68b1017
 .\"  Language: English
 .\"
-.TH "GIT\-MAP" "1" "03/25/2014" "depot_tools 207bff1" "Chromium depot_tools Manual"
+.TH "GIT\-MAP" "1" "04/10/2014" "depot_tools 68b1017" "Chromium depot_tools Manual"
 .\" -----------------------------------------------------------------
 .\" * Define some portability stuff
 .\" -----------------------------------------------------------------
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 .\" http://bugs.debian.org/507673
 .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 .ie \n(.g .ds Aq \(aq
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@@ skipping 110 matching lines @@
 Each value of the \fIdepot\-tools\&.map\-extra\fR config variable is applied as an additional argument to git log during the execution of git map\&. If you wish to configure this, use git config \-\-add depot\-tools\&.map\-extra <value> to do so\&.
 .SH "EXAMPLE"
 .sp
 Running \fIgit map\fR would result in an output something like:
 .sp
 .if n \{\
 .RS 4
 .\}
 .nf
 \fB$ git map\fR
-*\:\fB 7dcfe47       \fR (\:\fBfrozen_changes\fR\:) 2014\-03\-12 ~ FREEZE\&.unindexed
-* \fB4b0c180\fR        2014\-03\-12 ~ modfile
-* \fB59a7cca\fR        2014\-03\-12 ~ a deleted file
-* \fB6bec695\fR        (\:origin/master\:) 2014\-03\-11 ~ Add neat feature    \fB<(frozen_changes)\fR
-* \fBd15a38a\fR        2014\-03\-11 ~ Epic README update
-* \fBd559894\fR        (\:\fBmaster\fR\:) 2014\-03\-11 ~ Important upstream change
-| * \fB9c311fd\fR      (\:\fBcool_feature\fR\:) 2014\-03\-11 ~ Respond to CL comments
-| | * \fB2a1eeb2\fR    (\:\fBsubfeature\fR\:) 2014\-03\-11 ~ integrate with CoolService
-| | * \fBd777af6\fR    2014\-03\-11 ~ slick commenting action
+\fB* a8f0220    \fR (\fBfrozen_branch\fR) 2014\-04\-10 ~ FREEZE\&.unindexed
+* \fBc382556    \fR 2014\-04\-10 ~ modfile
+* \fB06e399f    \fR 2014\-04\-10 ~ a deleted file
+* \fB20494d2    \fR (\fBfixit\fR) 2014\-04\-10 ~ Add neat feature\fB    <(frozen_branch)\fR
+* \fBf734bbf    \fR 2014\-04\-10 ~ Epic README update
+| * \fB983a7b8  \fR (\fBcool_feature\fR) 2014\-04\-10 ~ Respond to CL comments
+| | * \fB2f53c1f        \fR (\fBsubfeature\fR) 2014\-04\-10 ~ integrate with CoolService
+| | * \fBb4e5087        \fR 2014\-04\-10 ~ slick commenting action
 | |/
-| * \fB265803a\fR      2014\-03\-11 ~ another improvement    \fB<(subfeature)\fR
-| * \fB6d831ac\fR      (\:\fBspleen_tag\fR\:) 2014\-03\-11 ~ Refactor spleen
-| * \fB82e74ab\fR      2014\-03\-11 ~ Add widget
+| * \fBac10591  \fR 2014\-04\-10 ~ another improvement\fB    <(subfeature)\fR
+| * \fB088691d  \fR (\fBspleen_tag\fR) 2014\-04\-10 ~ Refactor spleen
+| * \fB206ceb2  \fR 2014\-04\-10 ~ Add widget
 |/
-* \fBd08c5b3\fR        (\:\fBbogus_noparent\fR\:) 2014\-03\-11 ~ Wonderful beginnings    \fB<(cool_feature)\fR
+* \fB619ccc9    \fR (origin/master, origin/HEAD) 2014\-04\-10 ~ Make ReflectorImpl use mailboxes\fB    <(cool_feature, fixit)\fR
+* \fB40b838e    \fR 2014\-04\-10 ~ don\*(Aqt use glibc\-specific execinfo\&.h on uclibc builds
+* \fB65db351    \fR 2014\-04\-10 ~ [fsp] Add requestUnmount() method together with the request manager\&.
+* \fBc1923e0    \fR 2014\-04\-10 ~ linux_aura: Use system configuration for middle clicking the titlebar\&.
+* \fBccaca03    \fR 2014\-04\-10 ~ ContentView\->ContentViewCore in ContentViewRenderView
+* \fB9b1c1ab    \fR 2014\-04\-10 ~ ozone: evdev: Filter devices by path
+* \fBa91bbf9    \fR 2014\-04\-10 ~ Always output seccomp error messages to stderr
 .fi
 .if n \{\
 .RE
 .\}
 .sp
 .sp
 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