Implement Bazel build

Change-Id: I8cc93cc87284340f48735925313d602a11dba716

BUILD

diff --git a/BUILD b/BUILD
new file mode 100644
index 0000000..41f7da6
--- /dev/null
+++ b/BUILD
@@ -0,0 +1,12 @@
+load('//tools/bzl:plugin.bzl', 'gerrit_plugin')
+
+gerrit_plugin(
+  name = 'reviewnotes',
+  srcs = glob(['src/main/java/**/*.java']),
+  resources = glob(['src/main/resources/**/*']),
+  manifest_entries = [
+    'Gerrit-PluginName: reviewnotes',
+    'Gerrit-Module: com.googlesource.gerrit.plugins.reviewnotes.ReviewNotesModule',
+    'Gerrit-SshModule: com.googlesource.gerrit.plugins.reviewnotes.SshModule'
+  ]
+)