Overhaul scripts/java directory to conform to Octave core. Update docstrings. Use Octave coding conventions. Use default arguments where possible. Match variable names in docstring to variable names in function. HG: Enter commit message. Lines beginning with 'HG:' are removed. HG: Leave message empty to abort commit. HG: -- HG: user: Rik <rik@octave.org> HG: branch 'default' * errordlg.m, helpdlg.m, inputdlg.m, javaArray.m, javaaddpath.m, javaclasspath.m, javafields.m, javamem.m, javamethods.m, javarmpath.m, listdlg.m, msgbox.m, questdlg.m, warndlg.m: Overhaul functions. Update docstrings. Use Octave coding conventions. Use default arguments where possible. Match variable names in docstring to variable names in function.