dos style newlines in gse2

[megies]

Trying to read GSE2 files that have dos style newlines (CR+LF, '\r\n') results in chksum errors and wrong results. I am not sure but according to provisional_GSE2.1.pdf (pg.12) the newline is not restricted to a single LF, so this case might be allowed and should probably be covered.. (although LF+CR is not Dos style..)?

ASCII message lines may be up to 1024 characters long excluding the special
characters Line Feed (LF) and Carriage Return (CR).
An ASCII message line may be terminated by an LF or by an LF followed by a CR.

[beyreuth]

In [3402/obspy]:

closes #335, allowing dos newlines for gse data

• allowing to read dos style newlines
• needs recompilation of src