added secure upload
fixed syntax error in secure upload and modified _get_input to accept elem-parameter
created _info alias for _by_when
.zable_drilldown_buttons shortened to .zable_drilldowns
created .zable_put as alias for .zable_save
Added Flex modules and autoform
autoform path and file handling
renamed autoform to zaf and intergrated into std-targets.mk (also replaced use of whoami with env var kb)
autoform working
secure file upload fully functional
fixed error in Flexmenu show_file_info
v4.0.0 introduces secure file upload, Flex modules and Autoform