Increase Xdebug Nesting Level

When Magento2 first tries to build caches and tags after installation, the event observers can cause Xdebug to choke on the number of recursive functions.

An issue was raised with Magento about this (in a different context) in https://github.com/magento/magento2/issues/427
Merge pull request #2 from Morgon/patch-1

Increase Xdebug Nesting Level