Kludgy workaround for GH #32 and lefnire/habitrpg#815
hrpg help now provides a help screen.
Kludge on the kludge to detect item drops.
v0.18

    * BUGFIX:   Detect drops from upstream and direct user to web
                interface. Kludges GH #32 and lefnire/habitrpg#815 .

    * BUILD:    New dependency: Try::Tiny.

    * FEATURE:  `hrpg help` now provides a help screen.
Added experimental tag support to harpg and WebService:HabitRPG
Added configurable tag_prefix support. Updated hrpg docs with tag details.
Fix author tests for new attributes and profile changes.
v0.19

    * FEATURE:  `hrpg tasks` and `hrpg [daily|todo|habit]` now support
                an optional search parameter.

    * FEATURE:  Experimental tag support. Add a [tags] section to your
                ~/.habitrpgrc file with tag => uuid pairs. All searches
                starting with a '^' will match all tasks with that
                tag.  (Eg: `hrpg daily ^home`)

    * FEATURE:  Experimental tag prefix support. Add a [config]
                section to your ~/.habitrpg file and a
                `tag_prefix = whatever` section if you don't like the
                default tag character of '^'.
Display task creation info before buiding.
v0.20

    * DEBUG:    Settng HRPG_DEBUG=1 in the environment now shows
                arguments used to construct a task, *before* that
                task is actually constructed.
Tasks are always sorted by type again.
v0.21

    * FEATURE:  _get_tasks() now sorts by task type (todo/daily/etc).
                This emulates the behaviour provided by the older
                HabitRPG server codebase.
Bugfix on retrieving single task id.
Unpack task on _get_task