Anubis / Xlib

… undeletable directories

…d of <a> tag and let javascript transform input in decorated button

Maybe fix a long time bug.

Resolve Conflicts:	web/making_a_web_site.anubis

…mpty string "" as none DB_id

…mpty string "" as none DB_id

add button with a String as argument
add form without CoreAttrs as argument

add helper as CoreAttrs for (width, height, width_px, height_px, alt, for, type, placeholder, name, role)

…eal reason for that and the purpose

…ed entry into the web_session

…ne named "get_String".

…ample after a web_action executed, refresh the page (which made by the call back)

icnX(String icon) which return the full path to the icon. X must be replaced by the size of the icon. For example  icn8("foo.png") will return "icons/8x8/foo.png"
the list of the sizes is: 8, 16, 22, 24, 32, 48, 64, 128, 256

…se anymore the literal for the <nav> and <span> whom now exist as HTML tag

… when it become Xlib (some reference to CXM was still there)

in same time add a new alternative into left_menu type with "left_menu_entry_load_content". This is better to understand when constructing a menu