v1.1.0: Fixes + Unit Testing

What's Changed

• Unit Testing + Additional Fixes by @PeriBooty in #7

+ Added `DxInterpreter::registerFunctor`
+ Added `DxFormatStr` and `DxFormat` based on the `USE_FMTLIB` CMake option
+ Added Unit Testing for libdnxpp
- Removed `generator` class

Full Changelog: v1.0.1...v1.1.0