combo-layer enhancements

This replaces the four individual patches sent recently. It addresses the comments that Paul had, fixes one issue in file_exclude filtering of patches when combined with dest_dir, and last but not least, introduces full history importing during "init".

For the separate fixes see https://github.com/pohly/openembedded-core/commits/pending

The following changes since commit fb29441216435b9bae47ca9cd42db5a6b1fe77d8:

oeqa/parselogs: Skip hda opcode errors (2015-03-12 12:49:22 +0000)

are available in the git repository at:

git://github.com/pohly/openembedded-core combo-layer
https://github.com/pohly/openembedded-core/tree/combo-layer

Patrick Ohly (11):
combo-layer: let user choose where properties get updated
combo-layer: make Signed-off-by optional
combo-layer: runcmd() with separate output
combo-layer: exclude files
combo-layer: update() also instance property
combo-layer: init with full history
combo-layer: combine trees via replacement objects
combo-layer: partial import for '--history init' combo-layer-hook-default.sh: avoid duplicating prefix combo-layer-hook-default.sh: beware of embedded patches combo-layer-hook-default.sh: handle patches without Signed-off-by

 scripts/combo-layer                 | 277 ++++++++++++++++++++++++++++++++++--
 scripts/combo-layer-hook-default.sh |  11 +-
 scripts/combo-layer.conf.example    |  37 +++++
 3 files changed, 311 insertions(+), 14 deletions(-)

2.1.4