Update to 1.0.3

Upstream changes:
1.0.3: (doi: 10.5281/zenodo.165134)
- obspy.core:
  * properly pass through kwargs specified for Trace.plot() down to the
    low-level plotting routines (e.g. events were not shown properly in
    dayplot of a trace, see #1566)
  * properly pass through kwargs from Stream.detrend() to Trace.detrend()
    (see #1607)
  * Correctly splitting masked arrays in Trace objects for a couple of corner
    cases (see #1650, #1653).
- obspy.core.event.source:
  * Fix `farfield` if input `points` is a 2D array. (see #1499, #1553)
- obspy.clients.earthworm:
  * Better end of stream detection. (see #1605)
  * More efficient unpacking of server response. (see #1680)
- obspy.clients.neic:
  * Better end of stream detection. (see #1563)
- obspy.clients.seedlink:
  * Better end of stream detection. (see #1605)
- obspy.clients.seishub:
  * Fix wrong kwargs `first_pick` and `last_pick` in
    `Client.event.get_list()`. (see #1661)
- obspy.io.mseed:
  * ObsPy can now also read (Mini)SEED files with noise records. (see #1495)
  * ObsPy can now read records with a data-offset of zero. (see #1509, #1525)
  * ObsPy can now read MiniSEED files with micro-second wrap arounds.
    (see #1531)
  * ObsPy can now read MiniSEED files with no blockette 1000. (see #1544)
  * ObsPy now always writes Blockette 100 if sampling rate accuracy is
    otherwise lost. (see #1550)
  * obspy.io.mseed.util.set_flags_in_fixed_header() now works with Python 3
    and also for files with Blockette 100 (see #1648).
- obspy.io.quakeml:
  * write StationMagnitude.residual even when it is zero (see #1625)
  * read & write Event.region
- obspy.io.sac:
  * `SACTrace.lpspol` and `lcalda` are `True` and `False` by default, when
      created via `SACTrace.from_obspy_trace` with a `Trace` that has no SAC
      inheritance. (see #1507)
  * Reference time not written to SAC file when made from scratch
    (see #1575)
- obspy.io.sh:
  * Fix writing of long headers for python3
  * Whitespace in header fields is not ignored anymore (see #1552)
- obspy.io.stationxml:
  * Datetime fields are written with microseconds to StationXML if
    microseconds are present. (see #1511)
- obspy.io.zmap:
  * Use first origin/magnitude when writing to zmap if no origin/magnitude is
    set as preferred. (see #1569)
  * Parse origin time seconds as a float to avoid losing accuracy (see #1573)
- obspy.signal:
  * PPSD: fix warning message on Python 3 that gets shown when waveforms and
    metadata mismatch (see #1506)
- obspy.taup:
  * Allow for more than 10 phases with identical names (can happen for certain
    custom models, see #1593).

(wen)