v3.0.0

Summary:

• (Breaking Change) Update table getter methods to respect filter and orderby.
• Add the arquero-arrow package into the core Arquero package.
• Add file loading methods for URLs and local files.
• Update build system to use separate node.js and browser builds.

Changes from v2.3.0:

• Breaking: Update table get() and getter() to respect filter and orderby settings.
• Add load(), loadArrow(), loadCSV(), and loadJSON() file loading methods.
• Add table toArrow() method.
• Add table toArrowBuffer() method.
• Add top-level toArrow() method that encodes either Arquero tables or arrays-of-objects.
• Add top-level Type object to export Arrow type ids.
• Add table size property, which matches numRows(). (thanks @mbostock!)
• Update fromArrow() to also support Arrow buffer byte array input.
• Update fromJSON() for consistent auto-typing and to improve performance.
• Fix table reify() bug for Arrow columns with null values. (See also #99)
• Split node.js and browser builds.
• Add tests.