[WIP] - Moves output escaping into it's own dir so it can be made a git subtree.


| Q |	A |
| --- | --- |
| Bug fix? | no |
| New feature? | yes |
| BC breaks? |	no |
| Deprecations? | no |
| Tests pass? |	yes |
| Fixed tickets |	 #1408 |
| License | MIT |
| Doc PR | - |

this file does not contain a class, just the twig_escape function which cannot be autoloaded. in a composer situation the file option could have been used. however since this needs to work for users no using composer it is being required explicitly