Scenario objectives - Part III

[NickAragua]

Changes relating to scenario objectives, mostly relevant for template scenarios:

• Allow a scenario template modifier to add objectives to a scenario (e.g. a hostile facility may become a capture, an extraction, or whatever)
• Allow a force template to attach to other force templates for the purposes of objectives (e.g. when you add "enemy reinforcements", and there's already an objective to destroy the "primary opfor", the reinforcements become part of that objective as well)
• The rest of the scenario template files are human-readable
• Scenario modifiers that are not applicable at the current state of a template scenario are not displayed in the customize scenario UI
• Corrections to some bugs in objective completion determination and force parameter generation

[neoancient]

I haven't interacted much with this feature so I can't say much about the overall logic or the data, but the code changes made sense in their immediate environment and I didn't see any brain farts.

[lgtm-com]

This pull request introduces 1 alert when merging c413c54 into 996d331 - view on LGTM.com

new alerts:

• 1 for Spurious Javadoc @param tags

[NickAragua]

Just a quick update to utilize the correct calculation for arrival turn that's actually dependent on the scenario template.

[lgtm-com]

This pull request introduces 1 alert when merging b0e339b into ab2d5ae - view on LGTM.com

new alerts:

• 1 for Spurious Javadoc @param tags