Add "To Tray" menu.
Add alwaysTray option.
Add minimizeToTray option.
Fix a bug that an order of the system tray isn't kept in Windows 7.
Fix infinite loop on sysicon_addicon().
Add BackgroundBitMapPos option.
Merge pull request #12 from wantora/totray

ウィンドウをシステムトレイに収納できるようにする
Add CursorBlink option.
Merge pull request #16 from DeaR/backgroundBitmapPos

Add BackgroundBitMapPos option.
Merge pull request #17 from DeaR/cursorBlink-2

Add CursorBlink option.(squashed)