Add support for formatting large request bodies + Windows Test Fixes

[cholladay0816]

This PR is to fix an issue with oversized requests due to escapeshellargs byte limits. It also includes code to help make the tests pass on Windows.

• Fixed a major bug that would cause large requests to blow up. This was achieved by replacing escapeshellargs with an escapeShellArgument function, which uses Symfony Processes to accomplish the same thing without memory restrictions. (Thanks to @adduc for this solution, Add support for formatting large request bodies namshi/cuzzle#22)
• Includes a str_replace function in the test files to convert double quotes to single quotes, allowing the comparisons to work on Windows machines.

[octoper]

@cholladay0816 Thank you!