refactored the colormap unit tests (issue #31)
refactored the colormap unit tests (issue #31)

nlesc-sherlock/punchcardjs-demo,nlesc-sherlock/punchcardjs,nlesc-sherlock/punchcardjs-demo,nlesc-sherlock/punchcardjs,nlesc-sherlock/punchcardjs-demo,nlesc-sherlock/punchcardjs