moneyl 6497cdf8ff Add global verbs (#400) ...

* Add support for global verbs

These are verbs that are visible for all entities, regardless of their components. This works by adding a new class `GlobalVerb` and a new attribute `GlobalVerbAttribute`. It works in the same way as current verbs, except you can put the verbs class definition anywhere instead of inside a component. Also moved VerbUtility into it's own file since it now has functions for both verbs and global verbs.

* Add view variables verb as an example of global verbs

* Implement suggested changes

Implemented some suggested changes from code review:
- Remove unneeded attribute from `GlobalVerb`
- Added some useful attributes to `GlobalVerbAttribute`
- Moved constants used by both `Verb` and `GlobalVerb` into `VerbUtility`

* Reduce duplicate code in VerbSystem (client & server)

Greatly reduced the amount of duplicate code for handling component verbs and global verbs separately.

* Update engine submodule

Need this so client side permissions checks are available.

2019-10-30 16:31:35 +01:00

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