Changes for 1.5.3 - [DEV-171] added support of notification escalations on frontend side (Artem) - [DEV-173] added support of macros {EVENT.DATE},{EVENT.TIME},{EVENT.AGE} and {ESC.HISTORY} (Sasha) - [DEV-173] added support of notification escalations on server side (Sasha) - [DEV-172] added support of Apache authentication (Artem) - [DEV-170] improved charts period & start time selection (Artem) - [DEV-163] added support of perf_counter[path<,period>] (Sasha) - [DEV-169] improved msg functionality in GUI (Artem) - [DEV-149] added hosts masss update functionality (Artem) - [DEV-167] added support of Host Template=