Fixed typos and updated SearchManager to EsSearchManager in core readme

core/README.md

@@ -1,9 +1,9 @@
-The core module contains the core Geonetwork classes.  For example SearchManager for searching the metadata index, DataManager for saving
+The core module contains the core Geonetwork classes.  For example, EsSearchManager for searching the metadata index, DataManager for saving
 and loading Metadata.
 
-Services, Harvesters, etc... that are are plugins will usually depend on core and will make use of these core classes to implement their
+Services, Harvesters, etc... that are plugins will usually depend on core and will make use of these core classes to implement their
 services.
 
-Geonetwork is wired together via Spring-Dependency-Injection.  The critical classes (DataManager, SchemaManager, SearchManager, etc...) are
+Geonetwork is wired together via Spring-Dependency-Injection.  The critical classes (DataManager, SchemaManager, EsSearchManager, etc...) are
 all singleton beans in the application context and can be either injected into other beans or obtained via the ServiceContext.getBean
-method (or ServiceContext.getApplicationContext()).
+method (or ServiceContext.getApplicationContext()).