This reverts commit 79759fea, reversing
changes made to dc36f4df.

it is also a way to test that this change works as expected.

* Make it clearer which directory to `cd` to
* Take advantage of the work done https://github.com/grpc/grpc/issues/5982

As per the following line, it is 1.0.1 now: https://github.com/grpc/grpc/blob/6ff81e91c9577a52252460fb029fbbf990cfc7b6/examples/csharp/helloworld/Greeter/packages.config#L7

-) Fixing Bazel 0.4.x breakage
-) Adding helloworld BUILD examples
-) Fixing grpc++ missing files.
-) Adding helloworld example as a test for Bazel basic.

Setuptools was updated and our hacky namespace-package-chickens came
back to roost. This removes the unsupported namespace package hacks.

Setuptools was updated and our hacky namespace-package-chickens came
back to roost. This removes the unsupported namespace package hacks.