Update of the SEEDManual_V2.4.pdf to the latest version of August 2012
Merge pull request #577 from bonaime/master

Update of the SEEDManual_V2.4.pdf to the latest version of August 2012
Bugfix for waveform plotting.

There a slight error in the data binning. It always occurred but only
manifested for certain data lenghts. Also added a test for it.
stream.plot(): More fixes

Found another sample count that messes with the binning. This should
solve the issue.
update old ObsPy version number use in two places
Changelog for 0.8.4