Add suggest from searchLog.

.gitignore

pom.xml

src/main/java/org/codelibs/fess/api/json/JsonApiManager.java

...java/org/codelibs/fess/api/suggest/SuggestApiManager.java

src/main/java/org/codelibs/fess/entity/QueryContext.java

src/main/java/org/codelibs/fess/helper/SearchLogHelper.java

src/main/java/org/codelibs/fess/helper/SuggestHelper.java

src/main/java/org/codelibs/fess/util/ComponentUtil.java

src/main/resources/app.xml

src/main/resources/fess.xml

src/main/webapp/js/index.js

src/main/webapp/js/search.js

src/main/webapp/js/suggestor.js