Locking down npm dependencies, add caching to travis

package.json

@@ -9,35 +9,34 @@
   "engine": "node >= 0.12.2",
   "dependencies": {},
   "devDependencies": {
-    "angular-mocks": "^1.3.16",
-    "async": "^0.9.0",
-    "del": "^1.1.1",
-    "gulp": "^3.8.11",
-    "gulp-angular-templatecache": "^1.6.0",
-    "gulp-concat": "^2.5.2",
-    "gulp-eslint": "^0.13.2",
-    "gulp-htmlmin": "^1.1.1",
-    "gulp-jasmine": "^2.0.1",
-    "gulp-jsonlint": "^1.0.2",
-    "gulp-less": "^3.0.2",
+    "angular-mocks": "1.3.x",
+    "async": "0.9.x",
+    "del": "1.2.x",
+    "gulp-angular-templatecache": "1.6.x",
+    "gulp-concat": "2.5.x",
+    "gulp-eslint": "0.13.x",
+    "gulp-htmlmin": "1.1.x",
+    "gulp-jasmine": "2.0.x",
+    "gulp-jsonlint": "1.1.x",
+    "gulp-less": "3.0.x",
     "gulp-manifest": "0.0.6",
-    "gulp-minify-css": "^1.0.0",
+    "gulp-minify-css": "1.1.x",
     "gulp-rev-all": "0.8.18",
-    "gulp-sourcemaps": "^1.5.1",
-    "gulp-svgmin": "^1.1.2",
-    "gulp-svgstore": "^5.0.1",
-    "gulp-template": "^3.0.0",
-    "gulp-uglify": "^1.2.0",
-    "gulp-util": "^3.0.4",
-    "jasmine-core": "^2.3.4",
-    "json-concat": "0.0.0",
-    "karma": "^0.12.36",
-    "karma-jasmine": "^0.3.5",
-    "karma-mocha-reporter": "^1.0.2",
-    "karma-phantomjs-launcher": "^0.2.0",
-    "main-bower-files": "^2.6.2",
-    "phantomjs": "^1.9.17",
-    "run-sequence": "^1.0.2",
-    "uglify-js": "^2.4.19"
+    "gulp-sourcemaps": "1.5.x",
+    "gulp-svgmin": "1.1.x",
+    "gulp-svgstore": "5.0.x",
+    "gulp-template": "3.0.x",
+    "gulp-uglify": "1.2.x",
+    "gulp-util": "3.0.x",
+    "jasmine-core": "2.3.x",
+    "json-concat": "0.0.x",
+    "karma": "0.12.x",
+    "karma-jasmine": "0.3.x",
+    "karma-mocha-reporter": "1.0.x",
+    "karma-phantomjs-launcher": "0.2.x",
+    "main-bower-files": "2.8.x",
+    "phantomjs": "1.9.x",
+    "run-sequence": "1.1.x",
+    "uglify-js": "2.4.x"
   }
 }