53 vrp conflict updates

- fixes conflicts with the vrp plugin
- additional functionality to process token within a token, e.g.
a token with this value
```
[content-mixer source="14:%mixercategory%:100%:{2~3}" min="{1~3}" max="{3~5}" duplicates="none" spinoption="domainpage"]
```
The above is used as a token (`%fullmixer%`) which also uses a token (`%mixercategory%`).