Series.segment returning wrong object type

[alexkjames]

Describe the bug
If the segment() method is used on a LipdSeries object and gaps are detected, the subsequent MultipleSeries object contains Series objects instead of LipdSeries objects.

To Reproduce
Create a LipdSeries object with gaps in the time axis and apply .segment().

Expected behavior
The MultipleSeries object produced by .segment() should contain the same type of object (and associated metadata) as the one it was applied to.

Notes
This might be a good place to apply the new log functionality, as changes in the time axis of the LipdSeries object will go unrecorded in the attached lipd_ts attribute.

[khider]

Since we may change the architecture of LipdSeries, this may no longer be an issue. Wait until we learn more about how we want to handle data coming from a LiPD file

[CommonClimate]

@alexkjames did you end up resolving this?

[alexkjames]

@CommonClimate No, still waiting to hear regarding the fate of LipdSeries objects (see deborah's comment above)

[CommonClimate]

revisit after #270 is closed