API support to create and modify views and folders

[klehmann]

• supports creating views and folders
• add/remove/swap columns
• transfer view format from other views/folders
• change view/folder and column properties
• standard views and calendar views supported

Example:

    DbDesign design = db.getDesign();

    View newView = design.createView("my new view");
    newView.setSelectionFormula("Form=\"Person\"");

    newView.addColumn("Lastname col", "Lastname", (col) -> {
      col.setFormula("Lastname");
      col.getSortConfiguration().setCategory(true).setSortedDescending(false);
      CDResource twistie = CDResource.newSharedImageByName("twistie_plusminus_black");
      col.setTwistieImage(twistie);
    })
    .addColumn("Firstname col", "Firstname", (col) -> {
      col.setFormula("Firstname");
      col.getSortConfiguration().setSortedDescending(false);
    });

    newView.setSelectionFormula("Form=\"Person\"");
    newView.save();

[klehmann]

FIXES #296 FIXES #72