Make error/warning message presentation consistent
Hashing modes combined to reduce redundancy, more generic/descriptive display mode

Fixes #22 / https://github.com/OmegaPhil/animecheck/issues/22
Implement hashing task summary quashing
Implement hashing task summary for ed2k link mode

Fixes #21 / https://github.com/OmegaPhil/animecheck/issues/21
Version update: v1