json support

adds a JSON parser

Multi Placeholder Fix

• Multiple placeholders in fixtures fix by @olliebrennan

New Redis Persister

• Redis Persister contributed by @aaronweatherall

Fixing unit tests and minor refactor

• Fixing unit test (Thanks Travis)
• Minor refactor to improve Scrutinizer index

Improving performance for placeholder replacing feature

• Don't iterate over fixture that won't have placeholder substitution. User must specify the name of the fixture in the array passed to the Fixture Manager create method.

Adding Placeholder Replacing Feature

• Now you can put placeholders in the values of your fixtures and they will be replaced with the value you specify programatically when creating the Fixture Manager.
• Minor security validations

Minor fixes

• Making encoding for MySQL connection to be UTF-8

Minor refactoring

• Fixed exception message for duplicated fixtures.
• Moved getConnection() method to concrete Persister class since PDO connection can vary for a driver.