If the help file (welcome.htm) and readme file
(readme.htm) are not listed in the options element
of the kmp.json, check the file list. Read them
from the package using their default filenames if
they are found there.
When installed, packages keep a reference to their
location on disk so that they can delete their
associated files if removed. However, installation
from the internet now happens via a temp directory.
The directory must be updated when moved to the
install directory and there can be no trace of the
temp directory path anywhere when loading other
data from the package.
The cleanest way to accomplish this was to use
computed properties for the locations of all the
data like welcome.htm and the graphic image. These
properties are based on the single package
directory URL, and this URL is updated when the
package is moved.
