MALTAB reader added + SIZEOF issues fixed

In documentations we have:
"The compulsory fixed length header is a 10 byte binary header containing the feature vector dimension(5) (unsigned short = 2 bytes), a flag describing the content of the feature vector (long = 4 bytes) and the frame rate in Hz (float = 4 bytes)"
which is not consistent with implementation. SIZEOF_LONG is not 4 in all platforms and causes header to be not consistent with documentation. If header is to be "fixed length", no platform dependent sizeof instruction should be used.