Difference in wheel and tar.gz packages

[atodorov]

Since the changes in 0.9.2 which update the location of the tests/ directory and the way we include other files inside the package I've noticed a difference between the tar.gz package and a wheel package.

The wheel package doesn't include .rc or .txt files required for the tests and more importantly it doesn't include all the transformations files.

I have not examined older versions to see if this problem is present there.

Note to self: need to investigate why is this happening and also add a sanity test/make target to build the packages and compare the contents. While at it also add a sanity check to make sure we're not inclyding pyc files into the package.