Hxl-proxy

- update to libhxl 4.13, which adds support for row formulas and
fixes some bugs

- add Concatenate option to Count filter
- add /hash endpoint for generating a JSON dataset hash
- support zipped CSV files (via libhxl-python)
- fixed parsing of YYYY-MM-DD hh:mm:ss SQL dates (via libhxl-python)

- add special user-agent strings to help with analytics and traffic management

- add UI support for libhxl append-filter improvements (external list
and row filters)
- allow saved-recipe editing page to work even when there is a HXL error
(to fix broken recipes)
- updated libhxl to 4.10 (includes better date cleaning and CSV
separator detection, as well as the append-filter improvements)

2018-07-05 Release 1.9.1 (bug fix)
- fix bug in form-validation regex for tag patterns

- added IATI support with /iati2hxl?url=<url> endpoint
- added POST endpoint /actions/json-recipe for submitting JSON
recipes transactionally
- update forms validation to support new tag patterns ending in "!"
- refactored validation support to use JSON report from libhxl

- add UI support for JSON filter
- require libhxl==4.8.4 for JSON filter support