Changes:
- Switch from pointer singleton to pre-instanced singleton
- Added default constructor to cache_file object
- Fixed an issue where maps and vectors would not be cleared before (re)generating a cache.
Why? Shorter to write and removes the macro usage
I used the following regex to find all occurrences:
```r
RAGE_JOAAT\("(.*?)"\)
```
then the following to replace it all:
```r
"$1"_J
```
