Adding a general data ptr to support various data types, ie) dmap, hdf5, etc.
Merge branch 'enhancement_DataPtr' of github.com:vtsuperdarn/davitpy into enhancement_DataPtr
Fixed some problems but still not all working.
Finished the generalized DataPtr class.
Changed strong internal use to weak internal use (single underscore from double underscore). This makes is MUCH easier to inherit attributes from parent classes.
Added testing via the __name__ == __main__
Some code clean up.
Merge branch 'develop' into enhancement_DataPtr
Merge branch 'develop' of https://github.com/vtsuperdarn/davitpy into enhancement_DataPtr
Merge branch 'enhancement_DataPtr' of https://github.com/vtsuperdarn/davitpy into enhancement_DataPtr
Merge pull request #80 from vtsuperdarn/enhancement_DataPtr

Enhancement: Generalized DataPtr