http: better javadoc for AppEngineDataStoreFactory and MemoryDataStoreFactory

fix google-http-client-protobuf/.classpath

https://codereview.appspot.com/10369045/

Author: Yaniv Inbar

google-http-client-appengine/src/main/java/com/google/api/client/extensions/appengine/datastore/AppEngineDataStoreFactory.java

@@ -53,6 +53,10 @@
  * Engine Data Store API.
  *
  * <p>
+ * For convenience, a default global instance is provided in {@link #getDefaultInstance()}.
+ * </p>
+ *
+ * <p>
  * By default, it uses the Memcache API as an in-memory data cache. To disable it, call
  * {@link Builder#setDisableMemcache(boolean)}. The Memcache is only read to check if a key already
  * has a value inside {@link DataStore#get(String)}. The values in the Memcache are updated in the

google-http-client-protobuf/.classpath

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
 	<classpathentry kind="src" path="src/test/java"/>
-	<classpathentry kind="src" path="src/test/protobuf"/>
 	<classpathentry kind="src" path="src/main/java"/>
 	<classpathentry kind="src" output="target/test-classes" path="target/generated-test-sources">
 		<attributes>

google-http-client/src/main/java/com/google/api/client/util/store/MemoryDataStoreFactory.java

@@ -24,6 +24,10 @@
  * {@link Beta} <br/>
  * Thread-safe in-memory implementation of a data store factory.
  *
+ * <p>
+ * For convenience, a default global instance is provided in {@link #getDefaultInstance()}.
+ * </p>
+ *
  * @since 1.16
  * @author Yaniv Inbar
  */