up
admin manage: added log_exec and login_as to admin edit page
manage users: save as for manage admin: added links for edit form
common: log exec changed to class logs
main: added LOG_EXEC setting
tpl: LOG_EXEC_INFO setting now can be overriden with main()->LOG_EXEC
errors: added todo for logging
logs: improved log_exec, using submodules
moved log_exec from common submodules into logs, moved more classes from priority2 into priority1
added logs submodules, most of them for TODO
install project_conf: added main()->LOG_EXEC