created py-tomopy package and fixed its dependencies (#4576)

* added py-tomopy package

* fixed dependencies and added import_modules

* edited deps for tomopy with import_modules and added py-olefile pkg

* changed module name

* changed dependency to python because it will not build with setuptools

* fixed dependency list for py-tomopy and py-dxchange

* added py-nose dependency

* fixed tests

* commented out dependency py-counter

* fixed dependency py-pybtex-docutils

* removed nose as a dependency

* fixed flake8 errors

* fixed import_modules

* fixed import_modules indent

* fixed various issues in tomopy and deps files

var/spack/repos/builtin/packages/py-oset/package.py

@@ -31,6 +31,8 @@ class PyOset(PythonPackage):
     homepage = "https://pypi.python.org/pypi/oset"
     url      = "https://pypi.io/packages/source/o/oset/oset-0.1.3.tar.gz"
 
+    import_modules = ['oset']
+
     version('0.1.3', 'f23e5a545d2c77df3916398d2d39a3ab')
 
     depends_on('py-setuptools', type='build')