Adding isBirthday function to Carbon date comparison
Use assertSame
Update Carbon.php

Adding strict comparisons for the month/day checks.
Merge pull request #195 from lucasmichot/assert

Use assertSame
Merge pull request #193 from gayanhewa/is_birthday

Adding isBirthday function to Carbon date comparison
Simplified isBirthday().  Updated readme.
Moved isBirthday docs.
Improve some tests
Fix conflicts