ECF & User Msg Handler Changes

* ECF: Modified library locations. Still need to remove personal file
structure from IRON EWF
* HTML_FACTORY: Added `paragraph' <p> ... </p> tag generation support.
* EIS: Attempted sample EIS for PNG file. Need to submit bug report to
Eiffel Software for this.
* TEST_USER_MESSAGE_HANDLER: Change inheritance to bring in HTML_HELPER
and HTML_CONSTANTS as well as a `factory'. Then modified the
`user_message_get' to use the factory to build the response message.

TODO: Finish the other response messages to use the factory as well.