V1/V2 Feature Matrix

[jhollinger]

Feature	V1	V2 (2.0 branch)	V2 (#479)
View inheritance/composition	✓	✓	✓
Shared configuration	✓ (global)	✓ (inherit/compose)	✓ (inherit/compose)
Customize JSON serializer	✓
Identifier field & view	✓	✓ (inherit/compose)	✓ (inherit/compose)
Dynamic Blueprints	✓
Dynamic fields	✓	✓	✓
Field renaming	✓	✓	✓
Custom extractors	✓		✓
Formatters	✓		✓
Transformers	✓		✓ (via hooks)
Field sorting	✓		✓
if/unless	✓		✓
Exclude nil	✓		✓
Default/default_if	✓		✓
Root/meta	✓		✓
Hooks	✓		✓
Reflection	✓	✓	✓
Render Hash	✓		✓
Render JSON	✓		✓
Pass arbitrary data to render	✓	✓	✓
Instrumentable			✓ ("around" hooks)