Add custom "predicates"

[adrianoc]

$jira search :filter-name:

$jira search :filter-name: { $issue.Assignee == 'adriano' }

$issue => RemoteIssueFacade: a proxy that just routs calls to RemoteIssue if the member being accessed is not a custom field or map/resolve the member otherwise; for instance, while Assignee is a RemoteIssue field
                             Labels would me resolved to some internal class (lets say IssueLabels) that would receive RemoteIssue.customFields[ labels.id ] as an argument)

$jira search :filter-name: { $issue.Labels.Contains('tbv') } | assign unhappy-dev

Processing:

$jira search :filter-name: { $issue.Assignee == 'adriano' }

    - Run in a low privileged app domain (no i/o access for instance) ?

    - Emit a method that expects a RemoteIssueFacade as an argument:
        public static bool Predicate(RemoteIssueFacade issue)
        {
            return issue.Assignee == "adriano";
        }

    - run each issue returned by the filter against this predicate and pipe / return the ones that returned true