WD01 for v2.0 of the OpenC2 Language Specification

WD01 for Version 2.0 of the OC2 LS, with breaking changes from v1.0, CS02:

• Change "actuator" to "profile" (PR #391, PR #404)
• Remove Properties target (PR #401)
• Change mime_type to media_type (PR #405)

What's Changed

• Fix #376 on chairs/editors by @sparrell in #377
• v1.1 cleanup for wd by @sparrell in #378
• IACD reference by @sparrell in #379
• Add pf actuator profile to list by @alevere in #380
• Update Actuator description to function, not device by @davaya in #391 -- BREAKING
• add "description" as cmd arg by @dlemire60 in #395
• Rename actuator field to profile (issue #398) by @davaya in #404 -- BREAKING
• Need to split table in 3.4.2.1 (issue #396) by @dlemire60 in #399
• remove Properties target, example (issues #389, 392) by @dlemire60 in #401 -- BREAKING
• address RR=None plus Consumer error (issues #386, 387) by @dlemire60 in #402
• clarify Version string format (issue #388) by @dlemire60 in #403
• Document Use Of External registries by @dlemire60 in #405 -- BREAKING
• Change Version Information, v1.1 to v2.0 by @dlemire60 in #407
• Section 1 Simplification by @dlemire60 in #406
• Create JADN Appendix by @dlemire60 in #408

Full Changelog: WD17...v2.0-wd01