- dollar currencies and percentages properly detected as numbers
- parse potential CDATA segments in XLSX (fixes #775 h/t @awb99)
- IE8 issues with regex
- altjs demos

Issues:
- fixes #673 h/t @huhm
- fixes #748 h/t @sangpuion
- fixes #749 h/t @GreggOD
- fixes #772 h/t @sangpuion @jyyan