v0.7.1

• Add start and stop property to Slice. These return the timestamp in nanoseconds.
• Add start argument to Slice.plot() which allows you to use a specific timestamp as time point zero in a plot. See files and channels for more information.
• Added Slice.downsampled_like to downsample a high frequency channel according to the timestamps of a low frequency channel, using the same downsampling method as Bluelake.
• Fixed bug in Kymo plotting functions. Previously, the time limits were calculated including the fly-in/out times which could lead to subtle discrepancies when comparing against force channels. These dead times are now omitted.
• Add workaround for Scan and Kymo which could prevent valid scans and kymos from being opened when the start timestamp of a scan or kymo had a timestamp earlier than the actual start of the timeline channels. The cause of this time difference was the lack of quantization of a delay when acquiring STED images. This delay resulted in a subsample offset between the Scan/Kymo start time and the start of the timeline data which was falsely detected as a corrupted Scan or Kymo.