v0.0.2.9010

Feature

• Improved add new block.
• Added new category to the registry. Now when a block is registered, you may pass a category parameter (which is used by the add block feature to sort blocks):

register_block(
  constructor = new_tail_block,
  name = "tail block",
  description = "return last n rows",
  category = "transform",
  classes = c("tail_block", "transform_block"),
  input = "data.frame",
  output = "data.frame"
)

If not passed, the block will belong to uncategorized blocks (default).

Doc

• Improved registry and getting started vignettes.
• Add new case studies vignette to present blockr in various contexts.
• Refine GitHub readme.

Fixes

• Fix issue in handle_remove.block: vals$stack wasn't correctly updated
  when the last block was removed leading to wrong state.
• Loading spinner is now correctly hidden when the block visual is updated.