To do list

[piever]

• [x] Think about summarize groupby etc... Is there need for macros?

• [x] Pipeline when using functions from IndexedTables that don't take data as first argument?

• [x] Docstrings

• [x] support distributed tables?

• [x] allow escaping symbols

• [x] _ to refer to table inside @with

• [ ] Make all macros compatible with table of tables (better to wait for table of tables proper support in JuliaDB)

• [x] begin end syntax to make multiple transformations in a row

[piever]

Consider how best to optimize @apply for grouped data. Ideally, the macro should keep track of anything that happens during the grouping and only select the columns that are used.

[piever]

Regarding the distributed table support, we're missing a method for view(::DTable, i) and either broadcasting or indexing on Dagger.DArray

EDIT: all row-wise operation should automatically use delayedmap in the distributed case. Possibly add a chunk version of macros (@apply_in_chunks)