Merge pull request #1251 from ipfs/travis-split-go-sharness

.travis: split go and sharness tests

.travis.yml

@@ -10,7 +10,9 @@ go:
   - 1.3
   - 1.4
 
-script:
-  - make test
+env:
+  - TEST_NO_FUSE=1 TEST_VERBOSE=1 TEST_SUITE=test_go_expensive
+  - TEST_NO_FUSE=1 TEST_VERBOSE=1 TEST_SUITE=test_sharness_expensive
 
-env: TEST_NO_FUSE=1 TEST_VERBOSE=1
+script:
+  - make $TEST_SUITE