add new widget: picture
develop/estend the functionalities

1) dbmng_get_data: add LIMIT to manage pagination
2) dbmng_create_form: add a parameter to identify table view or form
view
3) dbmng_create_form: fine tuning adding the 'picture' widget
4) dbmng_value_prepare: fine tuning adding the 'picture' widget
5) dbmng_picture_create_link: create a new function to manage picture
6) dbmng_file_create_link: added $layout_type parameters to identify
table view or form view
7) dbmng_value_prepare_html: added 'picture' widget
develop/extend the functionalities

1) layout_form_file: added $aParam in the parameters
2) layout_form_picture: developed the function to manage picture
3) layout_table_body: manage pagination
4) layout_table: fine tuning
5) layout_table_navigation: developed to manage pagination