Create mainWFGnew.py

Create a wavefront, based on the zernike modes specified in the constructor.
The main WFG code should work

mainWFG contains the function wfg(...), which is called from the main
file, returning the phases. wfg() now takes more arguments, so the main
file is also updated. NOTE: the main file crashes on line 105 in the
main file, the WFR part, please update!
Some updates in the code

Some minor updates and file merges in the code.
Removed noll map import reference

Minor update, forgot it in the last update
testWFG

Now the test file is suiteble for unit testing, as was suggested by
Mario some time ago.
Reference data for unit testing

Some data sets with a defocus and and a index map.
Merge pull request #44 from faitdivers/WFG-for-Main

WFG