0.35: fix detection + fix dependency check + everything since 0.11

• adapt detection to changes from Google, fixes #2 (0.35)
• check for lxml module which is needed for the scraping method by BeautifulSoup4 (0.35)
• implemented threading for faster results (default: 10 threads) (0.3)
• implemented basic modularization (0.3)
• changed scraping method (only checking release date was unreliable) (0.2)

0.11: command line options + reduced country lists + live feedback

• specify PlayStore package name in command line argument, default is de.rki.coronawarnapp
• added live feedback to progress indicator
• added reduced lists of countries (default: Europe only, comment/uncomment for different lists)
• added requirements.txt

0.1 - Initial release

Initial release with basic functionality (check country availability of de.rki.coronawarnapp).