Add a warning to top of new rst files created using tox -e newfile.
The warning states that content should not be inserted between the
label and the title. This breaks auto-resolution of link anchors.
Change-Id: I654300d0232dbcb42c0f939f5fbe3d4935f4549c
Signed-off-by: Ron Stone <ronald.stone@windriver.com>
d466920c10