Moved the methods to create SQL queries(create table, insert, update, delete, select) from paperworker.master.core.PWMasterQuery.java to paperworker.core.PWQuery.java.
Modified some logics in these methods in paperworker.core.PWQuery.java for abstraction, using UNIQUE keys, and correspond to multiple primary keys.
Added 'unique' parameter to PWFieldBasicInfo.java for using UNIQUE keys.
Deleted paperworker.master.core.PWMasterQuery.java because of not used.
Master*.java files had some changes becase of all changes above.
Added a project for Holiday Division.
Added a project which operates about 'Holiday' request.