Nextflow

- Fixed Resume does not work for tasks successfully executed in a re-submit attempt 591
- Fixed An error is reported when a NF script contains a class definition 594
- Fixed Launcher error when download target path contains a blank character

- Fixed publishDir directive fails on S3 when attempting to copy objects larger than 5 GB 585
- Process name does not reflect dynamic tag declaration when a task execution is retried 586
- Fixed examples in the documentation
- Update to Gradle 4.5

- Fixed Config property keys may contain invalid characters
- Fixed Local process kill signal is not propagated to children processes 581
- Fixed Operator join throws a stack overflow exception when an invalid argument type is specified 582

- Fixed Invalid cast exception when cpus value is missing 575
- Fixed Kill the tee commands when the launcher script exit 574
- Fixed Splitter `limit` option is not honored when splitting more than one file 573
- Fixed AWS CLI operations with S3 should use the --only-show-errors options 567
- Fixed Splitter by option is not honored when splitting more than one file 570
- Documentation editing/improvement

- Fixed Log command prints true instead of actual message 561
- Fixed NXF_TEMP definition when instanceStorageMount is set
- Improved S3 exitfile logging
- Improved cloud config canonical formatting

- Fixed Ignore Windows instances from AWS cloud price listing
- Fixed AWS price reader catching unexpected errors
- Fixed sendMail access to owner variables
- Fixed NPE when creating task with ignite executor
- Fixed null exit status in notification template 554
- Added XPath serialiser
- Added mail smtp proxy configuration 375
- Added built-in notification documentation 554
- Added built-in mail documentation 375
- Added support for Syslog logging 330 557
- Improved support for AWS EC2 instance storage 558
- Improved documentation 558
- Improved config command adding `-flat` and `-properties` formats and using canonical curly brackets format as default
- Update copyright info