Also skip .files and _files with long filenames
Merge pull request #376 from kintel/skip_longfilenames

Also skip .files and _files with long filenames. I think its better than before. If somebody dislikes it, or wants additional configuration, it can be done in a future step. Thanks, Marius, and nice to have you helping!
Merge commit 'f8876a79584c0e3e954fa0ea4a5ae4eb97d6c013' into Reprappro_Mendel