Revert "Fixed crash on tapping on the last pixel on bottom"

This reverts commit 0f271210b09525c696ea080837528ef52d95e2de.
Hide tiles when they are not included in current month

In this case `hieTest:withEvent:` ignores such tiles and it fixes the
bug with tapping the bottom line in correct way.
Merge pull request #6 from carezone/yas-fix-tap-on-last-line

Fixed tapping on the last line in more correct way