fglgallery: Image gallery module

Table 1. fglgallery types (fglgallery.4gl)
Type	Description
`TYPE t_struct_value RECORD current INTEGER, selected DYNAMIC ARRAY OF INTEGER END RECORD`	The `t_struct_value` type holds image selection data.

Table 2. fglgallery functions (fglgallery.4gl)
Constant	Description
`FUNCTION addImage( id SMALLINT, path STRING, title STRING )`	Adds a picture resource to an fglgallery.
`FUNCTION clean( id SMALLINT )`	Removes all pictures from an fglgallery.
`FUNCTION create( name STRING ) RETURNS SMALLINT`	Creates a new fglgallery handle.
`FUNCTION deleteImages( id SMALLINT, indexes DYNAMIC ARRAY OF INTEGER ) RETURNS STRING`	Deletes pictures used in an fglgallery.
`FUNCTION destroy( id SMALLINT )`	Frees resources allocated for an fglgallery.
`FUNCTION display( id SMALLINT, type INTEGER, size INTEGER )`	Displays an fglgallery to the end user.
`FUNCTION finalize( )`	Releases the fglgallery library.
`FUNCTION flush( id SMALLINT )`	Displays new added images to the end user.
`FUNCTION getImageCount( id SMALLINT ) RETURNS INTEGER`	Returns the number of pictures in an fglgallery.
`FUNCTION getPath( id SMALLINT, index STRING ) RETURNS STRING`	Returns the URL of a picture in an fglgallery.
`FUNCTION getTitle( id SMALLINT, index STRING ) RETURNS STRING`	Returns the description of a picture in an fglgallery.
`FUNCTION initialize( )`	Prepares the fglgallery library for use.
`FUNCTION setImageAspectRatio( id SMALLINT, ratio DECIMAL(5,2) )`	Prepares the fglgallery library for use.
`FUNCTION setMultipleSelection( id SMALLINT, on BOOLEAN )`	Prepares the fglgallery library for use.