Alfred-pyworkflow

Now with real version support
- 44: `help_url` for URL link to help/support page. Shown in error logs and via `workflow:help` magic arg. [Docs](http://www.deanishe.net/alfred-workflow/api/workflow.html#workflow.workflow.Workflow).
- 21: `Workflow.dumbify_punctuation()` replaces curly and other exotic quotes, n- and m-dashes with ASCII equivalents. [Docs](http://www.deanishe.net/alfred-workflow/api/workflow.html#workflow.workflow.Workflow.dumbify_punctuation).
- 30: Turn automatic update checks off/on with `workflow:noautoupdate` and `workflow:autoupdate`. [Docs](http://www.deanishe.net/alfred-workflow/user-manual/magic-arguments.html).
- 32: Change magic arg prefix (`Workflow.magic_prefix`) and editing, augmenting of built-in magic args. [Docs](http://www.deanishe.net/alfred-workflow/user-manual/magic-arguments.html#customising-magic-arguments).
- 40: Proper semantic version support. First run/last run version support to enable bootstrapping/migration. [Docs](http://www.deanishe.net/alfred-workflow/user-manual/versioning.html).
- New magic args. [Docs](http://www.deanishe.net/alfred-workflow/user-manual/magic-arguments.html).
- `workflow:magic` lists all available magic args.
- `workflow:help` opens `help_url` in default browser (if set).
- `workflow:version` displays version of installed workflow (if set).

This release has a fatal error :hankey:

- 47 Cache and data files can be selectively deleted. [Docs](http://www.deanishe.net/alfred-workflow/user-manual/persistent-data.html#clearing-cached-data).
- 52 Handle gzipped HTTP data
- 53 `save_to_path()` method added to save HTTP response data directly to a file. [Docs](http://www.deanishe.net/alfred-workflow/api/web.html#workflow.web.Response.save_to_path).

- Remove `ICON_MUSIC` as it's no longer present in Yosemite.
- Add a few new system icons.
- Add `MANIFEST.in` so PyPI distribution works again.

GitHub releases marked as pre-releases will be ignored by the update code.

Thanks to fniephaus for the addition.

Previously, Alfred-Workflow would only recognise a workflow as having been update
for 60 seconds after the last update check.