Merge pull request #1 from zazi/master

README update
docu link
extracted index names + added some more logging information when flushing temp indices
enhanced logging
re-enabled GDMResource tests
Merge pull request #2 from zazi/batch_inserter

Batch inserter improvements + index naming extraction
[TASK][DD-832] Add license head to every file
Merge pull request #3 from knutwalker/master

[TASK][DD-832] Add license head to every file