the dependency fix: updated from the specfile
the dependency fix: updated from the specfile

- added graphviz, rubypick[1]

- specified that rubygem-test-unit needs to be the ruby2.1-rubygem-test-unit package to avoid the error documented in the specfile (ruby2.1-stdlib does NOT actually provide rubygem-test-unit capabilities)[2]

- layout minor changes: removed commas and moved swig's comment to the end of the line for easier copy paste from README to zypper

[1] a quick search on the build services gave no results about this package. Is this dependency in the spec file still actual?

[2] https://bugzilla.suse.com/show_bug.cgi?id=961709
openSUSE/libstorage-bgl-eval,openSUSE/libstorage-bgl-eval,aschnell/libstorage-bgl-eval,aschnell/libstorage-bgl-eval,aschnell/libstorage-bgl-eval,openSUSE/libstorage-bgl-eval,aschnell/libstorage-bgl-eval,aschnell/libstorage-bgl-eval,openSUSE/libstorage-bgl-eval,openSUSE/libstorage-bgl-eval