add filter brightness shorthand tests.
Merging PR #33: https://github.com/w3c/csswg-test/pull/33
moved to sparkgene's submitted folder

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rename : contributors/ttwf_tokyo/starters/svg-filters/svg-filters-ref-brightness-001.html => contributors/ttwf_tokyo/sparkgene/submitted/filters-ref-brightness-001.html
rename : contributors/ttwf_tokyo/starters/svg-filters/svg-filters-ref-brightness-002.html => contributors/ttwf_tokyo/sparkgene/submitted/filters-ref-brightness-002.html
rename : contributors/ttwf_tokyo/starters/svg-filters/svg-filters-ref-brightness-003.html => contributors/ttwf_tokyo/sparkgene/submitted/filters-ref-brightness-003.html
rename : contributors/ttwf_tokyo/starters/svg-filters/svg-filters-test-brightness-001.html => contributors/ttwf_tokyo/sparkgene/submitted/filters-test-brightness-001.html
rename : contributors/ttwf_tokyo/starters/svg-filters/svg-filters-test-brightness-002.html => contributors/ttwf_tokyo/sparkgene/submitted/filters-test-brightness-002.html
rename : contributors/ttwf_tokyo/starters/svg-filters/svg-filters-test-brightness-003.html => contributors/ttwf_tokyo/sparkgene/submitted/filters-test-brightness-003.html
added spec and reviewere links