Custom field when logging time

[s17t]

Some redmine instances requires custom fields when adding time entries. If this is the case hubot command to add hours won't work (the hubot will log Code: 422 error).

This feature request to propose following syntax support when adding time entries:

Hubot add [hours] hours to [issue id] "[comments]"; [field_id: "value", field_id: "value", ...]

and new command to print both custom field list and values (the base request is available in the base Redmine APIs since 2.4)

Hubot custom fields 
Hubot custom field [field_id] values