Initial Program Model Complete

There were some minor problems with the Save As action causing it to not work as desired, namely the file name was incorrectly defaulting to "." and the directory of the file saved was not being remembered.  The default file name was set to "." in the attempt to use the current directory, but the get save file name dialog saw this as the file name with no directory and used the directory the program was started in.  The string "./" should have been used.

The way it should be working is that the file name should start with the current file name giving the user the option to replace it or modify it.  If the user doesn't change the file name, the dialog will issue a warning asking if the file should be overwritten.  If the current file is untitled, then the default file name will be set to the current directory, and the dialog will contain a blank file name.  After the file is saved successfully, the current directory (that gets saved in the program settings upon exit) is set to the directory of the saved file.

Now it is time to start hooking up the parser and translator between the edit box and program model.  But first, this is a good point to make a development release.  The release related files were updated for a new release and the repository was given the tag v0.3.3.

[commit 143f449330] [commit f95a3d8d55]