* rename `beat` option to `stackBy` to `repeat`
* fix parse error reporting
* rename `weight` to `tactus` (it might in the end be pulse, step, or tap)
* tactus marking with ^
* and add some tests
* annotate pure values with their value, allowing single mininotation values to maintain their labels as pure
* Don't use any 'patternified' arguments if they're all 'pure'
* allow pattern weights (roughly, beats-per-cycle) to be inferred where possible, including from mininotation and across many transformations (e.g. `fast` with a 'pure' factor)
* Add `beatCat`, similar to `timeCat` but funkier
* `silence` has a weight of 1, add alternative `nothing` with a weight of 0, and `gap` function with weight argument
* preserve weight across applicative operations (weight comes with the structure)
* add `stack` alternatives that take advantage of pattern weights to align patterns differently - `stackLeft`, `stackRight`, `stackCentre`, `stackExpand`, with `stackBy` with an argument for patterning the alignment.
* the args for `pick` are now reversed as standard (old behaviour still supported to avoid breaking change)
* `pick` is also now a pattern method
* `pick` now also accepts a lookup table for pick-by-name as an alternative to pick-by-index from a list
* `inhabit` added with same behaviour as `pick`, except cycles from source patterns are squeezed into events of inhabited patterns
* Also some general doc tidying, sorry for the noise..
* There is also `pickmod` and `inhabitmod`, for wrapping indexes around rather than clamping them
- the args for `pick` are now reversed (breaking change!)
- `pick` is also now a method on the inhabited pattern
- `pick` now also accepts a lookup table
- `inhabit` added with same behaviour as `pick`, except cycles from source patterns are squeezed into events of inhabited patterns
- Also some general doc tidying, sorry for the noise..
- There is now also `pickmod` and `inhabitmod`, for wrapping indexes around rather than clamping them
