Added script to generate an Eclipse project for Bazel

Now a developer can work on the Java sources by generating an Eclipse
project with scripts/eclipse/setup.sh. The xcode tooling are also
imported compared to the previously checked-in project resulting in
a bunch of errors.

--
MOS_MIGRATED_REVID=88548129
diff --git a/scripts/setup-eclipse.sh b/scripts/setup-eclipse.sh
new file mode 100755
index 0000000..68ce918
--- /dev/null
+++ b/scripts/setup-eclipse.sh
@@ -0,0 +1,57 @@
+#!/bin/sh
+# Copyright 2015 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Generates an Eclipse project. If a .project is not present, it will creates
+# it and it will overwrite any .classpath file present
+#
+# Usage: ./setup-eclipse.sh
+#
+
+set -eu
+
+cd $(dirname "$0")
+cd ..
+
+# Simply creates a Eclipse java project
+if [ ! -f ".project" ]; then
+  cat >.project <<'EOF'
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+    <name>bazel</name>
+    <comment></comment>
+    <projects>
+    </projects>
+    <buildSpec>
+        <buildCommand>
+            <name>org.eclipse.jdt.core.javabuilder</name>
+            <arguments>
+            </arguments>
+        </buildCommand>
+    </buildSpec>
+    <natures>
+        <nature>org.eclipse.jdt.core.javanature</nature>
+    </natures>
+</projectDescription>
+EOF
+fi
+
+./scripts/generate-classpath.sh >.classpath
+
+echo
+echo '***'
+echo '*** Eclipse project generated'
+echo '***'
+echo
+echo 'You can now import the bazel project into Eclipse.'