Change travis to run fewer runs

- Remove Node 0.10
- Only run node-side tests with different node versions
- Only run Node 5.x when it is run with coverage

.travis.yml

@@ -1,10 +1,9 @@
 ---
 language: node_js
 node_js:
-  - "0.10"
   - "0.12"
   - "4.2"
-  - "5"
+#  - "5" - The test that includes coverage runs with 5
 
 sudo: false
 
@@ -14,11 +13,12 @@ cache:
 
 env:
   - NPM_SCRIPT=node-test
-  - NPM_SCRIPT=client-test
 
 matrix:
   fast_finish: true
   include:
+  - node_js: "4.2"
+    env: NPM_SCRIPT=client-test
   - node_js: "5"
     env: NPM_SCRIPT=jscs
   - node_js: "5"