heatmap can now be resized
heatmap can now be resized

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