Configuration consequences - cache_manager.py

[Wabri]

In the PR #55 I'm working on configuration files, when this PR will be merged is necessary to modify the cache_manager.py.

• For the cache_manager.py the ignore files of load_packages_from_directory method: https://github.com/YetAnotherPackageInstaller/YAPI/blob/e1810f900d5eb1985259092763366f01ca5942f2/cache_manager.py#L44
  will have default values:
  https://github.com/YetAnotherPackageInstaller/YAPI/blob/668bb59b38cce8cb541629296f22edcd512caf94/config.ini#L18

• The name of the cache file:
  https://github.com/YetAnotherPackageInstaller/YAPI/blob/e1810f900d5eb1985259092763366f01ca5942f2/cache_manager.py#L80
  change to default with the name in the configuration on:
  https://github.com/YetAnotherPackageInstaller/YAPI/blob/668bb59b38cce8cb541629296f22edcd512caf94/config.ini#L21

• And at the end must be update the directory of the cache:
  https://github.com/YetAnotherPackageInstaller/YAPI/blob/e1810f900d5eb1985259092763366f01ca5942f2/cache_manager.py#L115