Document CSV file format

o add a documentation test about quoted strings and escape chars
Merge pull request #2532 from davidegrohmann/csv-file-format-docs

Csv file format docs
Fix problem about not using indexes when multiple labels are present on a node

o fix conflicts between Ronja rewriters and legacy planner
o added more index acceptance tests
o fix the legacy planner builder to make sure indexes can use values generated by unwind
Typo in changelog for 2.1.2
Removed an incomplete log message. Should be properly done at a later point
Test accessing label changes in a TransactionEventHandler.
Readme cleanup in the distribution packages.
Bump concurrent lock holder limit to 4680
Merge pull request #2541 from jakewins/2.1-locklimit

Bump concurrent lock holder limit to 4680
Merge pull request #2542 from nawroth/readme

Readme cleanup in the distribution packages.
Removes unnecessary log4j references
Remove Log4j from licensing info.
Revert "Remove Log4j from licensing info."

Revert non-urgent changes before release.
This reverts commit 311c8388219dd858ef91b080aecce6f964decb3f.
Revert "Removes unnecessary log4j references"

Revert non-urgent changes before release.
This reverts commit c504ff4620c537f6f06ab8366dfa6e2d25d5ad9b.
Revert "Readme cleanup in the distribution packages."

Revert non-urgent changes before release.
This reverts commit c3f61a633026931312437fdb2e8db5109ccacccb.
Revert "Revert "Readme cleanup in the distribution packages.""

This reverts commit 7303642b345f528f6bf89cfe0948824d34450f0e.
Revert "Revert "Removes unnecessary log4j references""

This reverts commit ff05a2bf2a19b8694ecc792036deaae7b7a448c1.
Revert "Revert "Remove Log4j from licensing info.""

This reverts commit ede4eccd6be729ed73878536ca8e250de94c234f.
Add rewriter to transform equals for id(a), a.prop to in collection predicates
Add a rewriter for splitting IN in constants value and not constant values