Run hooks when breaks finish (short,long & general)
Clean up whitespace and headlines
Add custom time format for modeline time
Add new face for breaks
Fix time format to show minutes and seconds
Use cl-case instead of pcase
Write `cl-case` for case switching
Add expiry checks when starting a new pomodoro

Thanks to @chrisbarrett.
Use modulo to determine long breaks

Now the pomodoro count is only reset to 0 when the last pomodoro run has
been expired. E.g. the last clock in was longer ago than the threshold.
Bump version number to 1.2.0