Kinemetrics EVT data format support.

Added support for the format + tests + reference PDF.
> s/Obspy/ObsPy/

In general mention of ObsPy objects in documentation should be like..
```
:class:`~obspy.core.utcdatetime.UTCDateTime`
```
This links to the respective object in the documentation.
Type specifiers are `:class:`, `:func:`, `:meth:`, `:mod:`. The `~` strips the module structure.
However, in this private function this might be a bit too much hassle, just wanted to mention this here..