documentation still refers to 'demo' test which seems was RFed

[yarikoptic]

$> git show --stat 79e9a6a7e093ca69ea4b23b831e3ea6919e1a18a
commit 79e9a6a7e093ca69ea4b23b831e3ea6919e1a18a
Author: Michael Hanke <michael.hanke@gmail.com>
Date:   Sat May 25 12:14:32 2013 +0200

    RF: Expose search path as a variable in the TestCase, cache looup first

 testkraut/library/demo/bet_wf.py                        | 25 ----------------------
 testkraut/library/demo/spec.json                        | 99 ---------------------------------------------------------------------------------------
 testkraut/lookup.py                                     |  9 +++++---
 testkraut/testcase.py                                   | 12 ++++++++---
 testkraut/tests/localtests/check_fsl_workflow/bet_wf.py | 25 ++++++++++++++++++++++
 testkraut/tests/localtests/check_fsl_workflow/spec.json | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 testkraut/tests/test_localtests.py                      |  1 +
 7 files changed, 140 insertions(+), 130 deletions(-)

$> git grep 'testkraut.*demo'
doc/source/gettingstarted.rst:  % testkraut cachefiles demo
doc/source/gettingstarted.rst:  % testkraut execute demo
testkraut/cmdline/cmd_execute.py:$ testkraut execute demo.json
testkraut/cmdline/cmd_generate.py:$ testkraut generate --id demo -o test.spec -- bash -c "cat spec.json > newstuff"

$> testkraut --verbose-level debug cachefiles demo
DEBUG: using file cache at '/home/yoh/.cache/testkraut/filecache'
DEBUG: scan required files for test 'demo'
DEBUG: did not find SPEC for test 'demo' in library at '/home/yoh/.local/lib/python2.7/site-packages/testkraut/library'
ERROR: 'demo' is neither a SPEC, or a filename of an existing SPEC file, or an ID of a test in any of the configured libraries. (ValueError)