doc -> docs (pypi)

Signed-off-by: Nico Schottelius <nico@brief.schottelius.org>

docs/dev/todo/tests

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+Tests needed for config_install:
+
+   cleanup()
+      - Fail if cache_dir from previous run cannot be deleted
+      - Fail if cache_dir cannot be created from current out_dir
+
+   filter()
+      - ensure logformat is changed: target host is prefixed:
+         LOGLEVEL: target_host: MESSAGE
+
+   link_emulator():
+      - ensure that links to ALL types are created
+      - ensure that links points to correct executable
+         - i.e. readlink() works
+         - AND target of readlink is the correct executable
+
+   remote_mkdir()
+      - is directory created
+
+   remove_remote_path
+      - is path removed
+
+   transfer_path
+      - is src to dst transferred?
+
+emulator:
+   may only be called with __ as prefix - fail otherwise!