Improve options object docs.

[brannonh]

value-sculptor/README.md

Lines 141 to 158 in 4d4315d

	#### options
	The `options` argument is a `SculptOptions` object (or array of `SculptOptions` objects) that may contain the following key-value pairs. If `options` is an array, a separate value will be generated for each object in the array.
	| Key | Type | GeneratorType | Required | Default | Description |
	| --- | --- | --- | :--: | --- | --- |
	| charSet | `string` | `String` | | | A string of possible characters |
	| length | `integer` | `String` | :heavy_check_mark: | | The length of the string |
	| max | `integer` | `Number` | :heavy_check_mark: | | The maximum value to generate (inclusive) |
	| min | `integer` | `Number` | | `0` | The minimum value to generate (inclusive) |
	| padCharLeft | `string` | `String` | | space | The character to use for padding on the left, omit for spaces |
	| padCharRight | `string` | `String` | | space | The character to use for padding on the right, omit for spaces |
	| padLengthLeft | `integer` | `String` | | | The length of the string after padding on the left, **required** if `padType` is `PadType.Both` or `PadType.Left` |
	| padLengthRight | `integer` | `String` | | | The length of the string after padding on the right, **required** if `padType` is `PadType.Both` or `PadType.Right` |
	| padPriority | `PadType` | `String` | | | The side of the string to pad first, **required** if `padType` is `PadType.Both` |
	| padType | `PadType` | `String` | | | The type of padding to use (see [PadType](#PadType)), omit for no padding |
	| possibles | `string[]` | `Select` | :heavy_check_mark: | | An array of possible strings from which to choose one |
	| type | `GeneratorType` | | :heavy_check_mark: | | The type of value to create (see [GeneratorType](#GeneratorType)) |

This table should be split up into the different generator types.