Clipping during file read (pfb) take 2

Small changes to the clip reading code along with additional testing.

Clipping during file read (pfb)

Added a single function to read only a clip of the pfb file.
Fixed the windows build by forcing swig version.

v0.0.5

• Maintains C style indexing (zyx index order).
• Added loadDataThreaded() function to PFData class. It has the same functionality as loadData(), but loads the file in parallel, using the supplied number of threads.
• Added indexOrder property to PFData class. It indicates the indexing order of the numpy arrays associated with the PFData object. It defaults to "zyx".
• Fixed Windows CI build wheel by upgrading cibuildwheel from version 1.5.5 to 1.11.0.
• Fixed bug related to loading and writing large files. Has now been tested with files up to 65G.