added ircmaxell/passwort_compat
updated min php version to 5.3.7
use password api (password_hash() and password_verify())
use tilde operator for versions
added password_needs_rehash() check
fixed typo
added password functions to rex_login
added $isPreHashed parameter
moved $isPreHashed parameter to rex_login base class
Merge pull request #180 from redaxo/password-hashing

PHP5.5 Password Api