removed: templates/item.cpp
updated: some html templates which use [item] or [item_tab]
removed some old html templates: item_info.html and itam_tab_info.html
- commented out using mount_page_arg_is "subject" and "info" from fun_cat.html and fun_run.html - they will be removed soon
- some improvements in fun_reply.html, fun_showthreads.html and fun_thread.html (scrolling)
- when returning json streams changed "out" field to "frames"
- renamed config parameter: allow_ezc_out_in_executable_items -> allow_ezc_frames_in_executable_items
- added basic support for ajax requests in thread plugin