Add support for the paginate tag

[charlespwd]

In this PR

• Add support for the paginate liquid tag
• rename the ohm rule renderArguments -> tagArguments, because it starts to look like the comma-less pattern is repeated

Decisions

• Echoing Add support for form liquid tags #75, {% paginate $collection on the first line
• MAYBE break by $size if really indented far
• MAYBE break window_size: X (undocumented feature) (and join with commas)
• %} on empty line if breaking

Examples

It takes a collection and a pageSize
{% paginate collection by pageSize %}{% endpaginate %}

It breaks on by pageSize when printWidth is hit
printWidth: 1
{% paginate collection
  by pageSize
%}
  {{ collection }}
{% endpaginate %}

It is undocumented, but it also accepts named attributes (window_size). Those are comma separated.
printWidth: 80
{% paginate collection by pageSize, window_size: 50, attr: (0..2) %}
  {{ collection }}
{% endpaginate %}

It is undocumented, but it also accepts named attributes (window_size). We print
those comma separated and on a new line when it breaks.
printWidth: 1
{% paginate collection
  by pageSize,
  window_size: 50
%}
  {{ collection }}
{% endpaginate %}

Demo on dawn (no change... 👍)

Fixes #61