Changed the `__repr__` output to include the flags(it can be changed back, but it was usefull to implement the fuzzy header parsing). The `Catalog` class now also includes an extra attribute, '''`fuzzy`''', which is the fuzzy bit of the catalog header. The above change allows the `compile_catalog` frontends to only compile catalogs '''not''' marked as fuzzy, unless `--use-fuzzy` is passed. Added tests to check header fuzzy bit parsing.