Removing unused directories for umbrella package.

Also updating tox and Travis configs to ignore the
`py${VERSION}` tests for the umbrella package and
changing the umbrella `cover` command to no longer
refer to the now removed base `unit_tests`
directory.

Author: dhermes

.travis.yml

@@ -5,7 +5,6 @@ install:
   - pip install --upgrade pip tox
 
 script:
-  - tox -e py27
   - (cd core && tox -e py27)
   - (cd bigtable && tox -e py27)
   - (cd storage && tox -e py27)
@@ -21,7 +20,6 @@ script:
   - (cd vision && tox -e py27)
   - (cd translate && tox -e py27)
   - (cd speech && tox -e py27)
-  - tox -e py34
   - (cd core && tox -e py34)
   - (cd bigtable && tox -e py34)
   - (cd storage && tox -e py34)

google/__init__.py

@@ -71,11 +71,6 @@
     version='0.20.0dev',
     description='API Client library for Google Cloud',
     long_description=README,
-    namespace_packages=[
-        'google',
-        'google.cloud',
-    ],
-    packages=find_packages(),
     install_requires=REQUIREMENTS,
     **SETUP_BASE
 )

google/cloud/__init__.py

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py27,py34,py35,cover,docs,lint
+    cover,docs,lint
 
 [testing]
 deps =
@@ -25,12 +25,6 @@ covercmd =
       --cov=google.cloud \
       --cov=unit_tests \
       --cov-config {toxinidir}/.coveragerc \
-      unit_tests
-    py.test --quiet \
-      --cov=google.cloud \
-      --cov=unit_tests \
-      --cov-append \
-      --cov-config {toxinidir}/.coveragerc \
       core/unit_tests
     py.test --quiet \
       --cov=google.cloud \