added sqlite dependency
added conversion functions for datatype of sqlite (Timestamp, Boolean)
added add-pgms to add pgms with one transaction
changed timing call call-hook-updated
made to share single DB connection and removed c3p0
tuned the limit to retry fetching RSS
truncated URL query parameter from thumbnail's URL
changed initializing procedures
fixed queries for sqlite and changed initializing procedure
fiixed some potential inefficiency
let dialogs dispose on close
removed an unnecessary function
removed an unnecessary function
let alert_dlg remove ActionListener
added nico.ui.PgmMouseListener class
exclude dependency of org.apache.ant
changed displaying alert method from future to SwingWorker
improved handling thumbnail image
uniformed how to load ImageIcon from resource
some tuning