update credits sorting order
temprorary fix for tutorial doing seismometer correction based on old
IRIS web services. Whole section needs refactoring.. :(
Linear image on non-linear axis.

Employing a trick to get rid of the warning when using imshow() on
non-linear axis. The results are identical but I guess more correct and
no more warning is raised. See #748.
Replacing imshow() with proper logarithmic plotting.
Replacing TFMisfit plotting with proper logscale plotting.
Ensure some counts are really integers.
Force plotted trace type to be float.
Merge branch 'releases'
Fixing travis for now.
should fix travis failing on py2.6
Merge remote-tracking branch 'upstream/master' into event_plot_refactor