Some test preparations

Signed-off-by: Daniel Schnell <dschnell@posteo.de>
version bump to 0.0.11pre

Signed-off-by: Daniel Schnell <dschnell@posteo.de>
Fix #21: use portable RakeFileUtils instead of sh commands for touch,
rm

Signed-off-by: Daniel Schnell <dschnell@posteo.de>