Fix call function issue

Merge pull request #34 from antham/add-ability-to-remove-backups

Fix function call

Add helm-backup-remove-file-backups

• Add helm-backup-remove-file-backups to remove all backups of a file

Fix encoding issue

• It was possible to save a file containing special characters like accents in its filename but not to retrieve any backup associated to it, the message "No filename associated with this buffer...." was displayed.
• We switch to v1.0.0 only to follow semver now, it is not a breaking version.

Fix troubles with some shells

• Concat shell commands with && wasn't working in all shells (fish).

v0.2.1

Merge pull request #21 from michael-heerdegen/master

bump version to 0.2.1