2.2.7 version released

Final release 2.2.7 available
- added another constructor to LoginDialog, in order to manually set the window size; useful when using OpenSwing with no "system" Look and feels
- added "cleanUp" method to GridControl and Form panel, in order to clean up the row/form content in INSERT/EDIT modes

The distribution includes also Jar file libraries, source files, javadoc, licence and readme.txt installation instructions.