Fixes an issue with tx log reading in severely damaged log files.
Merge pull request #1967 from jakewins/2.0-txlognulls

Fixes an issue with tx log reading in severely damaged log files.
Refrain from creating an EagerPipe around updating pipes if the source
pipes do not read from the database
Fix the Windows build

Make sure the file URLs for CSV files are correct on Windows.
Second attempt at fixing the Windows build
Fix the exception handling for cleanup tasks in ClosingIterator
Third attempt at fixing the Windows build
Merge pull request #1993 from jakub-/pipe-reads-from-database

Refrain from creating an EagerPipe around updating pipes if the source
Update ClosingIteratorTest after Andres' cleanup task refactor
Merge pull request #1964 from jakub-/exception-handling-fix

Fix the exception handling for cleanup tasks in ClosingIterator
Make non-existent property reads return null rather than throw exceptions
Disable LOAD CSV in 2.0
Merge pull request #1999 from jakub-/map-404-key-null

Make non-existent property reads return null rather than throw exceptions
Merge pull request #1997 from jakub-/disable-load-csv

Disable LOAD CSV in 2.0
rewrite: extract parameters from literals