Multi-word context dimensions, select nodes for adjustment

What's Changed

• Allow dashes in context dimension names by @psss in #255
• Strip merge suffix in root node as well by @lukaszachy in #280
• Add callback to limit which nodes are adjusted by @lukaszachy in #282
• Use the AdjustCallback protocol for decision_callback by @psss in #283
• Release fmf-1.7.0 by @psss in #284

Full Changelog: 1.6.1...1.7.0