worked 0.1.0

Worked is really the simplest time recording (or tracking, whatever term you prefer) application that does all you need and nothing more (only `date >> file` is easier). It simply takes a time or a time range and an activity and appends it to a hidden file in the current directory. The use case is, that you have '.worked' files in the root directories of your projects, and before you finish your current work period, you probably commit something and you also record your time. Right now, the times are just recorded, no report generation yet.