implement new config

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branch : configuration-next
add config reader, writer stuff, need to be fully implemented

--HG--
branch : configuration-next
put some life in default configuration reader / writer

--HG--
branch : configuration-next
the containertest hits my nerves

--HG--
branch : configuration-next
add test for default configwriter/reader

--HG--
branch : configuration-next
use text instead of blob (better editable) and add default configuration to db import

--HG--
branch : configuration-next
remove config defaults yml file

--HG--
branch : configuration-next
liberalize sly_Slice_Renderer

--HG--
branch : configuration-next
rename : lib/sly/Slice/Renderer.php => lib/sly/Slice/RendererImpl.php
all config entries tolowercase

--HG--
branch : configuration-next
merge with configuration-next
merge
ignore file not found for local config files
fix tests