wip: LiftImport

- Refactoring LiftDecoder
- Added LiftImportErrorReport
- Added tests for Lift from FLEx
wip: More FLEx fields.
Added more FLEx field support with tests.
Merge branch 'feature/liftimport'

Conflicts:
	src/models/languageforge/lexicon/LiftDecoder.php
	src/models/languageforge/lexicon/LiftImport.php