More consistent calling of examples, make intend of make.

Preparing behavior for Xierpa3App. Change run to make in example sites.
Add XML document about hell world example. Set getExportPath module to
builder. Components should not know where saved files are going. Now
the export path is in the user directory, so the Xierpa checkout source
no longer get changed by added files. Remove makeDirectory attribute
from component save. Directories are created inside the user/Desktop
export folder. @@@ Export folder will not work on Windows this way.
Remove files folders from the hello world examples.