Start preparing the API documents.

Most of them are still stubs, but the procedure to build the HTML
documentation, maintaining the index and installing the end product are
there.

I placed names of people who are likely to know the most about the topic
in the stub files, so that volunteers will know whom to ask questions as
needed.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/technical/api-run-command.txt b/Documentation/technical/api-run-command.txt
new file mode 100644
index 0000000..19d2f64
--- /dev/null
+++ b/Documentation/technical/api-run-command.txt
@@ -0,0 +1,10 @@
+run-command API
+===============
+
+Talk about <run-command.h>, and things like:
+
+* Environment the command runs with (e.g. GIT_DIR);
+* File descriptors and pipes;
+* Exit status;
+
+(Hannes, Dscho, Shawn)