<commit_before>json/parse/schema: Parse a JSON Document into an object structure and/or while validating it against a JSON Schema

Features:

* Stream parse a JSON document
* Provide useful feedback about JSON parse errors
	- Line numbers
	- Repeated keys
	- Syntax errors
* Validates the JSON document against a JSON Schema
	- Provides line/character information of error
* Parse JSON instances into an instance of an arbritrary object - parse dates directly into Date, integers into arbritrary precision object, objects into Immutable Map, etc.
	- Allow JSON values to be filtered through a filter after parsing, so strings can be cast to Dates, objects to Immutable objects, etc.
   - Filter based on schema URI, type, format, and non-trivial cases like too-big numbers, and whatever else is appropriate

```javascript
var p = new Parser({type:'array'}, {keepValue:true});

fs.createReadStream('test/syntax-suite/test_parsing/i_structure_500_nested_arrays.json')
	.pipe(p)
	.on('finish', function(err, res){
		console.log(p.errors);
		console.log(p.value);
	});
```<commit_msg>Add README.md example of Schema#createParser usage<commit_after>json/parse/schema: Parse a JSON Document into an object structure and/or while validating it against a JSON Schema

Features:

* Stream parse a JSON document
* Provide useful feedback about JSON parse errors
	- Line numbers
	- Repeated keys
	- Syntax errors
* Validates the JSON document against a JSON Schema
	- Provides line/character information of error
* Parse JSON instances into an instance of an arbritrary object - parse dates directly into Date, integers into arbritrary precision object, objects into Immutable Map, etc.
	- Allow JSON values to be filtered through a filter after parsing, so strings can be cast to Dates, objects to Immutable objects, etc.
   - Filter based on schema URI, type, format, and non-trivial cases like too-big numbers, and whatever else is appropriate

## class: Parser

```javascript
var parser = new Parser(new Schema({type: 'array'}), {keepValue:true});

fs.createReadStream('file.json')
	.pipe(parser)
	.on('finish', function(err, res){
		console.log(parser.errors);
		console.log(parser.value);
	});
```

## class: Schema

```javascript
var schema = new Schema({ type: 'array' });
var parser = schema.createParser({keepValue:true});

fs.createReadStream('file.json')
	.pipe(parser)
	.on('finish', function(err, res){
		console.log(parser.errors);
		console.log(parser.value);
	});
```
{'fraction_non_alphanumeric': 0.09543065103113627, 'fraction_numerical': 0.001213101496158512, 'mean_word_length': 4.793911007025761, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 3, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '842823', 'n_tokens_mistral': 705, 'n_tokens_neox': 678, 'n_words': 284}