Please add support for complex uint16_t and int16_t file types

[darkstar007]

Hi,

My LimeSDR and USRP1 both can output unsigned/signed 16bit ints as a file format (which is obviously half the space of a complex float). Would it be possible to add support to read (u)int16_t files to save the time & disk space of having to convert the files to complex floats? I had a quick look and will attempt to add it myself, but it appears not to be as trivial as I was hoping!

Thanks,

Matt

[darkstar007]

See pull request here #6