Multiple ticks per day

**Implementation of feature:** https://github.com/lordi/tickmate/issues/11

Changes included:
* Extended settings to switch between one bit and multi mode
* Additional database logic to store time information and tracking mode
* Special button with counter to add multi ticks
* Flexible max value for tick graphs
* Delete button on track info screen
* Strings for added dialogs (en, de)
* Inverted order of days on startup screen (most recent at top)