imported namespace spectrum in __init__.py
Getting rid of some unnecessary init files and updated the important ones.
Ading setup environment support.
implemented test_construction in the test_spectrum
implemented test_copy in the test_spectrum
Merge branch 'master' of https://github.com/odarbelaeze/spectraplotpy

Conflicts:
	spectraplotpy/__init__.py
implemented mul and add in spectrum.py
modified test_copy and test_add in test_spectrum.py