Documentation: add a couple of missing docs.

Signed-off-by: Junio C Hamano <junkio@cox.net>

Documentation/git-merge-tree.txt

@@ -0,0 +1,37 @@
+git-merge-tree(1)
+=================
+
+NAME
+----
+git-merge-tree - Show three-way merge without touching index
+
+
+SYNOPSIS
+--------
+'git-merge-tree' <base-tree> <branch1> <branch2>
+
+DESCRIPTION
+-----------
+Reads three treeish, and output trivial merge results and
+conflicting stages to the standard output.  This is similar to
+what three-way read-tree -m does, but instead of storing the
+results in the index, the command outputs the entries to the
+standard output.
+
+This is meant to be used by higher level scripts to compute
+merge results outside index, and stuff the results back into the
+index.  For this reason, the output from the command omits
+entries that match <branch1> tree.
+
+Author
+------
+Written by Linus Torvalds <torvalds@osdl.org>
+
+Documentation
+--------------
+Documentation by Junio C Hamano and the git-list <git@vger.kernel.org>.
+
+GIT
+---
+Part of the gitlink:git[7] suite
+

Documentation/git-mktree.txt

@@ -0,0 +1,35 @@
+git-mktree(1)
+=============
+
+NAME
+----
+git-mktree - Build a tree-object from ls-tree formatted text
+
+
+SYNOPSIS
+--------
+'git-mktree' [-z]
+
+DESCRIPTION
+-----------
+Reads standard input in non-recursive `ls-tree` output format,
+and creates a tree object.  The object name of the tree object
+built is written to the standard output.
+
+OPTIONS
+-------
+-z::
+	Read the NUL-terminated `ls-tree -z` output instead.
+
+Author
+------
+Written by Junio C Hamano <junkio@cox.net>
+
+Documentation
+--------------
+Documentation by Junio C Hamano and the git-list <git@vger.kernel.org>.
+
+GIT
+---
+Part of the gitlink:git[7] suite
+

Documentation/git.txt

@@ -100,6 +100,9 @@ gitlink:git-merge-index[1]::
 gitlink:git-mktag[1]::
 	Creates a tag object.
 
+gitlink:git-mktree[1]::
+	Build a tree-object from ls-tree formatted text.
+
 gitlink:git-pack-objects[1]::
 	Creates a packed archive of objects.
 
@@ -265,6 +268,9 @@ gitlink:git-checkout[1]::
 gitlink:git-cherry-pick[1]::
 	Cherry-pick the effect of an existing commit.
 
+gitlink:git-clean[1]::
+	Remove untracked files from the working tree.
+
 gitlink:git-clone[1]::
 	Clones a repository into a new directory.
 
@@ -319,6 +325,9 @@ gitlink:git-resolve[1]::
 gitlink:git-revert[1]::
 	Revert an existing commit.
 
+gitlink:git-rm[1]::
+	Remove files from the working tree and from the index.
+
 gitlink:git-shortlog[1]::
 	Summarizes 'git log' output.
 
@@ -357,6 +366,9 @@ gitlink:git-cvsimport[1]::
 gitlink:git-cvsexportcommit[1]::
 	Export a single commit to a CVS checkout.
 
+gitlink:git-cvsserver[1]::
+	A CVS server emulator for git.
+
 gitlink:git-lost-found[1]::
 	Recover lost refs that luckily have not yet been pruned.
 
@@ -399,9 +411,15 @@ gitlink:git-count-objects[1]::
 gitlink:git-daemon[1]::
 	A really simple server for git repositories.
 
+gitlink:git-fmt-merge-msg[1]::
+	Produce a merge commit message.
+
 gitlink:git-get-tar-commit-id[1]::
 	Extract commit ID from an archive created using git-tar-tree.
 
+gitlink:git-imap-send[1]::
+	Dump a mailbox from stdin into an imap folder.
+
 gitlink:git-mailinfo[1]::
 	Extracts patch and authorship information from a single
 	e-mail message, optionally transliterating the commit
@@ -411,6 +429,9 @@ gitlink:git-mailsplit[1]::
 	A stupid program to split UNIX mbox format mailbox into
 	individual pieces of e-mail.
 
+gitlink:git-merge-tree[1]::
+	Show three-way merge without touching index.
+
 gitlink:git-patch-id[1]::
 	Compute unique ID for a patch.