Removed Yosemite and El Capitan runs.

We now only produce Mavericks binaries, because those build steps run so much faster.
Yosemite and El Capitan via VMWare on 2009 era Mac Book Pros just cannot complete in time.
Now attempting to run all the unit-tests again, to see if we can get them reliable.

.travis.yml

@@ -48,18 +48,6 @@ matrix:
               - TRAVIS_BUILD_TYPE=RelWithDebInfo
               - ZIP_SUFFIX=osx-mavericks
               - TESTS=On
-        - os: osx
-          osx_image: xcode7.1
-          env:
-              - TRAVIS_BUILD_TYPE=RelWithDebInfo
-              - ZIP_SUFFIX=osx-yosemite
-              - TESTS=On
-        - os: osx
-          osx_image: xcode7.3
-          env:
-              - TRAVIS_BUILD_TYPE=RelWithDebInfo
-              - ZIP_SUFFIX=osx-elcapitan
-              - TESTS=Off
 git:
     depth: 2
 cache:
@@ -75,12 +63,12 @@ before_script:
     - ../scripts/release.sh $ZIP_SUFFIX $TESTS
 script:
     - cd $TRAVIS_BUILD_DIR/..
-    #- git clone https://github.com/ethereum/tests.git
-    #- export ETHEREUM_TEST_PATH=$(pwd)/tests/
-    #- cd $TRAVIS_BUILD_DIR/build
-    #- ./test/libethereum/test/testeth
-    #- ./test/libweb3core/test/testweb3core
-    #- ./test/webthree/test/testweb3    
+    - git clone https://github.com/ethereum/tests.git
+    - export ETHEREUM_TEST_PATH=$(pwd)/tests/
+    - cd $TRAVIS_BUILD_DIR/build
+    - ./test/libethereum/test/testeth
+    - ./test/libweb3core/test/testweb3core
+    - ./test/webthree/test/testweb3    
 deploy:
     provider: releases
     api_key: