fix 1560 add version info

.gitignore

pom.xml

src/main/java/org/codelibs/fess/Constants.java

src/main/java/org/codelibs/fess/api/BaseJsonApiManager.java

...org/codelibs/fess/app/web/admin/webconfig/CreateForm.java

src/main/java/org/codelibs/fess/app/web/api/ApiResult.java

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

...in/java/org/codelibs/fess/mylasta/direction/FessProp.java

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

src/main/resources/app.xml

src/test/java/org/codelibs/fess/helper/SystemHelperTest.java