* Implement concept of "marked dates" - this allows us to display more than one date as a selected date, for instance displaying previously booked dates. Also allow the developer to specify "markedTxt" as distinct from "disabledTxt" as these concepts are now decoupled.
* Implement concept of "marked dates" - this allows us to display more than one date as a selected date, for instance displaying previously booked dates. Also allow the developer to specify "markedTxt" as distinct from "disabledTxt" as these concepts are now decoupled.

New methods:
* setDayMarked(dc, dateObj, isMarked)
* clearAllMarked(dc)

accdc/bootstrap,accdc/bootstrap