Rearranged example directory

Moved IPNotebooks into the Examples directory. Created new directory of
scripts called Scripts within the examples directory.
Updated doctext for zSetSolve & added unittest

The doctext for zSetSolve was misleading, according to which the
function expected a tuple/list for the solveData argument. However, in
reality, it is expecting an unpacked sequence of parameters.
Merge pull request #14 from indranilsinharoy/working

Merge bug fix on zSetSolve from working to main