Create a branch for 0.1.0
Add option defaultCalculationSpan

to calcule specified (business) day(s)
Increase version numbers
Merge pull request #1 from ymrl/default_calcurate_day_option

Add option defaultCalculationSpan
style fix : color and underline of the day
Merge pull request #2 from ymrl/colour_fix

style fix : color and underline of the day
Merge pull request #3 from ymrl/version_0_1_0

Version 0.1.0