Import 'B' response type (Hz) and converted it to 'A' (Laplace)

Using this patch permits to work with Poles and Zeros given in Hz (B response type in Seed documentation).

* The poles, zeros  are converted in Laplace (rad/s) - seems to be de default behavior of rdseed - 
* The normalisation factor is also scaled. 
* It applies to Parser and also to the arclink client.
* paz['response_type'] was added in the arclink client.
Does this really require a warning? Is the file broken in some way by using this format?