Use http_archive instead of git_respository as per the bazel team's r…

…ecommendations. (#29)

Closes #14

WORKSPACE

@@ -12,14 +12,18 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-git_repository(
+http_archive(
     name = "build_bazel_rules_apple",
-    remote = "https://github.com/bazelbuild/rules_apple.git",
-    commit = "7ea0557",
+    url = "https://github.com/bazelbuild/rules_apple/archive/0.2.0.zip",
+    strip_prefix = "rules_apple-0.2.0",
+    # Generated by running: openssl sha -sha256 <path to zip>
+    sha256 = "4ae91e15243fbe39a02b7e9a1bba6de50c5554443a30c5587cfeff7404dfdd56"
 )
 
-git_repository(
+http_archive(
     name = "bazel_ios_warnings",
-    remote = "https://github.com/material-foundation/bazel_ios_warnings.git",
-    tag = "v1.0.1",
+    url = "https://github.com/material-foundation/bazel_ios_warnings/archive/v2.0.0.zip",
+    strip_prefix = "bazel_ios_warnings-2.0.0",
+    # Generated by running: openssl sha -sha256 <path to zip>
+    sha256 = "199f1b1726ca561d5dedcb3876094a9604f603dc8d737b0e6b8866a70dc8a90d"
 )