add --upstream, --upstream-development and --repos  options (fix #20)
fix checking for release version when only --upstream-development is requested
add warning for skipped unreleased repos, fix syntax for another warning
fix handling of repositories specified as --repos without having release (fix #22)
fix output when only unreleased repos are specified
add --exclude-path option
add --include-path option
rename --include-path to --from-path
add minimum version for catkin_pkg
fix from_paths argument
fix upstream options
fix --upstream-development logic
update argument help to use catkin/rosbuild instead of wet/dry terminology
Merge pull request #21 from ros-infrastructure/upstream_options

add --upstream, --upstream-development and --repos  options