added idea project files to gitignore
The readFrame() method in Stomp.php was not compatible with RabbitMQ
and possibly other STOMP servers. It worked with Apollo since
Apollo always sends a newline after the null character. The
STOMPspecification only calls for a null character as termination,
so I have updated the readFrame() method to read a character at a
17:04off of the socket. This way the library supports only a
nullcharacter as termination, but still handles multiple frames onthe
socket without having to implement a buffer for overreads.