Add support for double episodes

[gethvi]

Please consider support for renaming double episodes of TV shows. Sometimes two episodes are released as one video. Currently if the original filename contains for example "S01E01E02" or "SE01E01-E02" mnamer recognises it only as "E01" and the rest is omitted.

Thank you!

[TheFrenchGhosty]

Really needed features, some shows are only available with double episodes.

Example: SpongeBob SquarePants: https://en.wikipedia.org/wiki/SpongeBob_SquarePants_(season_1)#Episodes

[jkwill87]

mnamer understands combined episode files and renames them using the first episode in the range. This was a design choice and intentional to avoid additional complexity and changes to its templating variables.