0.7.0:
 * changing license to LGPL (same as libmseed)
 * libmseed 2.7 (fixes sampling rates above 32,767 Hz)
 * adding read/write support for very large and very small sampling rates using
   blockette 100 in MiniSEED
 * new obspy-mseed-recordanalyzer script for analyzing SEED files via console
 * new obspy.mseed.util.shiftTimeOfFile() function for shifting
   the time of all records without interfering with the rest of the file.
