Expand Stopwork API
Expand Stopwork API

Add goto_slide, current_slide_number, remove_slide,
remove_current_slide, add_slide, add_slide_here, replace_slide,
replace_current_slide, storage_id, and init methods

nasser/stopwork,roymacdonald/stopwork,solon/stopwork,roymacdonald/stopwork,solon/stopwork,roymacdonald/stopwork,solon/stopwork,nasser/stopwork,nasser/stopwork