Improved execution time for each loop (until the image is fully gerated) to less than 5 seconds. Of course, it takes much longer to render the image to the display as well as for calibration.
Implemented possible bugfix for iCalendars as suggested by arustleund in issue#20
Improved algorithm for sleeping until the next update and for counting loops left until calibration.
Some minor changes to improve code readbility
Added RSS-feedparser. Added support for user-defined display-update intervals. Removed support for recurring events (temporarily).
Imporved processing time for the generated image form nearly 30 seconds to less than a second. Improved readability of docstrings.
Switched from using bitmap images to png images for images with transparency mask (event, today, weekday). Also, using a custom processing function that processes the generated image so it can be displayed much better on the E-Paper Display.
Added info about the module and a 'timer' to time the time taken for calibration. Improved some output messages for easier understanding. Switched form generating images to opening images, hence allowing a slightly faster calibration.
In the calibration module, previously an image with only one colour was first generated converted and then displayed. To decrease the calibration time a little, the updated module does not generate the images, but rather opens them from the 'other' path. As the image does not need to be generated each time, calibration now works a little faster.
Contains a lot of minor improvements like better output, fixing some 'crude' sections. The algorithm for fetching events has been improved (faster) and is more dynamic. Users can specify the range in days for fetching events form the future. Also fixed a bug where past events were not marked with circles on the monthly calendar. Also improved some output messages.
You can now choose how far in the future events from your iCalendar should be fetched. The value is given in days. By default, events in the next 60 days will be fetched from the Calendar.
Removed line 82, starting with 'draw...' as it caused some errors. Choosing weekday="Sunday" should now work as expected.
Special thanks to Nobuyoshi Sato for finding this bug.
Contains some improvements in the section tha filters events from the iCalendar URL. The sorting algorithm has been improved to display events after today and in chronological order. If the event names is too long for the line, it'll be truncated until it fits.
Special thanks and credit to Hubert for suggesting the above mentioned improvements.
Also fixed an issue where the iCalendar would throw errors if the Alarm action for an event was set to 'None'.
Fixed a bug causing an error on 2 colour displays.
(UnboundLocalError: local variable 'red' referenced before assignment)
Cause: incorrect indent block on line 27
