minor BasH5Reader change proposal

minor BasH5Reader change proposal

Using the BasH5Reader is simple:

  >>> b = BasH5Reader("m1122...bas.h5")  # Load the file
  >>> zmw = b[9]                         # Get Zmw object(s) by slicing on holenumber(s)
  >>> myRead = zmw.subreads[0]           # Get ZmwRead object
  >>> myRead.basecalls()
  "GATTACA"
  >>> myRead.QualityValue()
  array([5, 6, 3, 4, 8, 8, 1])

My change proposal is to unify the naming of the ZmwRead accessors in
the Zmw class, and to provide the following principle:
  * zmw.read, zmw.subReads, zmw.ccsRead are all HQ clipped;
  * zmw[start:end] (and zmw[:]) is for the power user who may want to
    go outside the HQ region.

Here is the change description:


| Old            | New                          | Description                              |
|----------------+------------------------------+------------------------------------------|
| zmw.read()     | zmw.read or zmw.unrolledRead | property returning entire read sequence, |
|                | (decision needed)            | clipped to the HQ region                 |
|                |                              |                                          |
| zmw.read(s, e) | zmw[s:e]                     | Access a custom subslice of the read.    |
|                | zmw[:]   (to get everything) | This is the only way to get data from    |
|                |                              | outside the HQ region---intended for     |
|                |                              | power users.                             |
|                |                              |                                          |
| zmw.subreads   | zmw.subReads                 | change name for consistency              |
|                |                              |                                          |
| zmw.ccsRead    | zmw.ccsRead                  | no change                                |
|                |                              |                                          |
|                |                              |                                          |