Simplify localization code, remove extension

Compatibility with tvOS

Update CalendarKit.podspec

Merge pull request #355 from glaphi/refactor/code-cleanup

Refactor code cleanup

Merge pull request #351 from MojtabaHs/master

fix: some typos and misspells in comments and a typo in the code and a missed `arc4rand` replacement

Merge pull request #342 from aegzorz/localization-build-fix

Minor localization fix

Improve readability

Merge pull request #335 from mac22/properly-updating-height-of-the-view

Updating day view for OS version > 11 if you plan to hide the header …

Update localizations

Update CalendarStyle to match iOS Calendar