Support more options for RubyGit#log

[dometto]

RubyGit#log supports the following logging options:

• path filter
• skip
• max_count

However, JGit supports more. RubyGit#log should

• [x] be able to follow files across renames
• [ ] be able to traverse certain ranges of commits only
• [ ] be able to log for an array of refs
• [ ] be able to exclude some file paths

See http://download.eclipse.org/jgit/docs/latest/apidocs/

[bartkamphorst]

After looking into to this briefly, it seems that LogCommand's not(AnyObjectId start) method excludes refs, not file paths. Is that the functionality you want?

I think the ranges (and array of refs) should not be hard to wrap.

[bartkamphorst]

See also here for more on the --follow option in JGit.