Support for .git-ftp-including files without any git dependencies

Sometimes you need to upload outside of git on every change.
Say, an automatically generated changelog, or git log -1.

This change makes it possible to add entries like
    !templates/devel-version.tpl
to .git-ftp-include.

Such files are always marked as modified.
Merge pull request #3 from himdel/develop

Support for .git-ftp-including files without any git dependencies